I enjoy everything about my new digital camera except for the short battery life, which is especially annoying when on multi-day hikes when the battery might suddenly go dead. Are there any solar-powered products out there for recharging batteries while on the trail? John Swanton, Maryland

Oh Being of All Gear Wisdom, Following your sage advice, I've been looking for a Yashica T4 point-and-shoot to replace my partner's camera, which bit the Grand Canyon's dust on our last trip there. It appears that Yashica no longer makes the T4. Nor do they seem to have a successor model. What's your current recommendation for either a fixed or zoom lens 35mm P&S? Being a photographic troglodyte, no digital cameras allowed. Rob Brading Fairview, Oregon

I want to take my video camera with me on a trip to the Colorado mountains and hoping I can buy a solar panel to charge the battery. There seems to be some difficulty with finding info. It's a 6-volt battery and I have the adapter that plugs into a car cigarette lighter. Can I buy a 5-watt solar panel that is advertised to charge a 12-volt car battery and use it? Can I just wire up the cigarette lighter receptor to the panel, and then plug the adapter into it? Seems to me that ought to work. But, we don't know much about solar panels other than expeditions use them to charge batteries. Jeannette Singleton

I have never spent a night on the trail, sticking to day trips instead. However, it's something that I think I would like to get into. My hiking partner has the tent, stove, and first aid kit. I don't want to go out and buy all the other equipment (sleeping bag, pad, boots, etc.) until I certain that backcountry camping is for me. What would you suggest for my first trip? . Melissa Greenwood, Delaware

Can you recommend a three-season tent that is well configured and roomy for two people and a dog? Tom Miller San Francisco, California

What's your take on Backpacker's Pantry Outback Oven? Does the Outback Oven really bake well and also conserves fuel for cooking traditional grub? After a zillion meals of mac and cheese, ren, gorp, and dried fruits, the Ziplocs carrying the food start looking more appetizing then the food within. The idea of dining on hot cinnon rolls, fresh pita bread, pot pies, or (gasp!) brownies does make me wonder if the Outback Oven really works or if it's just another ravenous hikers delusions? Ed Beaudry Laurel, Maryland

Years ago you recommended The North Face Snowshoe sleeping bag to me, just the ticket for a dp 58 hours in Lapland's freezing rain! Since your record is one for one, I seek your advice again for a compact, light sleeping bag (down is out due to allergies) to use when backpacking in Croatia in August. We'll be sleeping hut-to-hut while walking in the countryside, while also spending some time in cities. Do you think Design Salt's silk liner is good enough for such a trip, or do we need an ultralight sleeping bag? Jan Helsinki, Finland

I would like to know what the difference is between Marmot's 800-fill Couloir and 600-fill Never Summer sleeping bags if they both have a rating of zero-degrees. I'm going to Patagonia in January and would like to know which bag you would use, although I'm not yet sure what elevation I'll be at. Hans Norton, Massachusetts

What's the scoop on Eureka's Zeus EXO line of single-wall backpacking tents? They're inexpensive, light for the square footage, and look to have the se super-quick setup as the larger Eurekas. Do you have any info on how well these tents vent? Bill Charlottesville, Virginia

I'm a 40-year-old dad planning to be a mule for my young family of five (wife, two daughters, ten and 12 years old, and seven-year-old son). I'm looking for a large capacity (6,000-plus-cubic-inch) backpack. I'm currently looking at the Osprey Crescent 110, Dana Designs Terraplane, and Arc'Teryx Bora 95. I realize pack comfort will differ based on individual size and body shape. Of these three I mention, and possibly others I haven't, which carries the heaviest loads and provides the most comfort. Frank Hahn Chula Vista, California

I'm curious to hear your opinion about Osprey's line of Ariel backpacks, particularly their Ariel 75. I can't seem to find any reviews on anything other than the Aether 60. I loved the Osprey Luna 75, but I'm looking for something slightly lighter. My main concern is whether the suspension of this smaller pack will hold up under a 40-pound load. I don't want to sacrifice good load transfer and stability simply for the sake of a lighter pack. Erica Boston, Massachusetts

This summer, I will be traveling in Peru and concerned about thieves cutting into my pack. What do you recommend to protect my belongings? Pat Harlingen, Texas

I'm planning an Appalachian Trail through-hike for 2003. I've poured over all the gear columns/ratings/etc. And with a bit of your wisdom have narrowed down most of my gear. But...I'm thinking of going stoveless. What's your opinion and do you know any recipes for easy/light/nutritious stoveless meals? Tim Moose, Wyoming

What do you recommend for mountaineering in places such as Mount Rainier and Denali as far as headlps and bibs or pants? Would an LED light be better than a regular headlp? I know LED lights last much longer, but what about lighting up the trails? Also, are there any three-layer bibs that you would recommend that are warm, durable, and inexpensive? I like the description of the Marmot Alpinist but it's quite expensive. Are there any less expensive options? Charleton Churchill Pine Grove, California

I'm hiking the Grand Canyon rim to rim this spring, and I'm wondering what footwear to use. I like the lightness and cushioning of the trail runners that I've been using for my ten-mile training hikes, but I'm wondering if I need something a little more burly for my unsteady legs over the course of the 24-mile hike. Any thoughts on the Lowa Tempest? Jay Phoenix, Arizona

Are there poles that could do double duty for downhill skiing and trekking? Or is that too much to ask from a set of poles for around $100? Dan Pittsburgh, Pennsylvania

My family of five—myself, wife, and three decent-sized kids—plus the dog would like to go snow camping, and I think I've got everything covered except the tent. As for cost, we'd prefer to be comfortable and broke over rich, frozen, and miserable. Unfortunately, I can't seem to find a suitable five-person tent—MSR's StormKing comes close, but only allows 12 square feet per person. I have concerns about splitting the family into two tents in potentially nasty weather. Do you have any advice? Nathaniel Nevada City, California

I own a 1994 Isuzu Trooper SE that has a moon roof and a factory luggage rack. I looking for a roof rack system to carry bikes. I've looked through Thule and Yakima online, and wondered if I could use the existing luggage tracks and buy towers to go with them and then the bars. I really want something for the roof, not a tire or hitch mount. WD Ray Columbia, South Carolina

Oh, Gauis Gear Guy (bet you haven't heard THAT one before), I have a multitudinous problem. I wrote to you years ago about detached toenails, and you delivered the goods shiningly. My problem is still with my feet. The last two trips I've taken in my Zberlans boots have left me hobbled, with huge Susan B. Anthony pus-bubbles on either heel. I went to a clinic and was informed that my feet were "problematic" and that I was wearing the wrong boot. My right foot while standing is about a quarter inch longer than the left. My feet are wide and low profile, with anemic arches and narrow heels. Oh yeah, I also have weak ankles. Now I have June trips planned in the Grand Canyon and the Sierra. I've bought the Superfeet shrink-to-your-dogs prosthetic insoles, but I need a new boot. What do you recommend, outside of foot-transplant surgery? Thanks, Thomas Perkins Alexandria, Virginia

My wife and I will be hiking in the Canadian Rockies this summer. We'd each like to carry a pair of compact binoculars for birding and the occasional vast vista that we might come upon. Without breaking the bank (we don't need waterproofed and rubber-armored), what would you recommend? As far as magnification goes, should we consider buying zoom binoculars or stick with a basic model? Also, how important is it to have the widest field of view possible? Byron Phoenix, Arizona

Last summer, I bought a Shan light touring kayak from Wilderness Systems (based largely on your recommendation, O Great and Wise One). After some great day trips, I'm now planning a multi-night river trip, so I'm looking for some packing advice. The boat has a rear bulkhead and an air bag up front for flotation. Should I pack my gear at the back with extra stuff lashed atop the stern, or can I replace the front flotation bag with a tapered dry bag? Zippo Baltimore, Maryland

I need a good solo tent in the $200 price range for winter mountain climbing trips. It seems that manufacturers have come out with many new solo tents, but I can't tell if any of them would work for winter camping. Mike Rapid City, South Dakota

In southern California the sun is out and the hills are green. Yes, it's almost spring, the time when a young man's fancy turns to...cycling. My helmet is several years old, and I think it's time to retire it. Thumbing through a number of catalogs, I can't believe the wide range of prices. Just what the heck does $200 buy me that $40 doesn't? Larry Long Beach, California

This summer I plan on taking a backpacking trip to the Selway River or Kelly Creek in Idaho. I hope to do some fishing as well, which will require wading in the river. I do not want to take wading boots due to the weight. Do you have any recommendations for sandals or other footwear that can serve as both hiking sandals and water sandals? I need good sole support for hiking and walking over boulders while wading. I also require a non-slip surface that will grip wet rocks. I have found that hook-and-loops material does not work well when wet. Last summer, the hook-and-loop straps kept coming undone on my Tevas. Any help is greatly appreciated. J.L. Walker

I'm looking for a women's pair of insulated, waterproof or Gore-Tex, crampon-compatible hiking boots. I'm not climbing Mount Everest—what I'm looking for is a boot to get me through the winter when I don't need snowshoes, but it's freezing out and I may need crampons. (Specifically, in the High Peaks area of New York.) I'll be using them for long hikes on paths and over rocks. I don't seem to be able to find the perfect combo as most options seem to be heavy-duty mountaineering types. BJ Guilderland, New York

For a few years I have been using a Macpac Microlight tent, perfect for me and my pack. However, I'm now looking for a slightly larger tent to also accommodate my dog. Finding that Macpacs are not sold in this country and mail order prices are exorbitant, I was wondering what you'd recommend that's comparable in durability, waterproofness, weight, and quality, hopefully for a more reasonable price. Jennifer Seattle, Washington

I live in the city and looking for a bike that I can ride to my local bike trail via city streets (approximately three miles). The trail is dirt and gravel, but I'll also need front suspension because of reckless drivers who sometimes force you onto a sidewalk. I have been to several bike stores and really confused by all the options: Raleigh C500, Cannondale, Giant Cypress LX, Trek? One store advised me to wait until mid-August for the 2004 models to arrive in stores. My budget is $500 to $600. Chris Philadelphia, Pennsylvania

I'm planning to climb Aconcagua next year followed by Denali the year after, and I was wondering about layering for warmth using down sleeping bags and parkas. I want to avoid buying really specialized gear (like the Feathered Friends Rock & Ice Parka, or their Snowy Owl bag) that I can only use on the coldest peaks like Denali. Is it possible to achieve a comfortable temperature rating on this mountain using a combination of the Icefall Parka and the Widgeon bag? The reason I'm asking is I would like one bag for all my mountaineering endeavors (including the not-so-cold trainer mountains). John Toronto, Ontario

I wear prescription lenses in my sunglasses and want to get a similar custom-made pair of glasses for paddling at night. I've heard that a yellow tint on the lenses helps to bring out objects. Is this true? Is there anything else I should consider when ordering this pair of glasses? Dennis Milton, Florida

I'm going to Alaska's Denali in June, so are there any particular jackets out there that you would recommend? Would the Marmot Parbat Parka be sufficient on a breezy day atop Mount Denali? Eric Maryland

How do you know when it's time to replace your running shoes? I have been road running on a pair of New Balance 804s for about a year. I weigh 200 pounds and run about two to three miles five days a week. Any suggestions for new shoes? Craig Portland, Oregon

My son and I need to purchase raingear for an eight-day canoe trek to Minnesota's Boundary Waters Canoe Area this July. Do I need to get a Gore-Tex parka like most people recommend, or are the newer, lighter styles like Marmot's PreCip enough for such a trip? David Wichita, Kansas

A friend suggested that I extend the life of my leather hiking boots by proactively applying se-grip to the stitching and the area where the upper meets the sole of the boot. Is this legitimate advice or have the petroleum distillates simply gone to his head? Chuck Freeport, Maine

I sweat a ridiculous ount and have no problem staying warm, having nordic skied in sub-zero temps wearing only a thin nylon T-shirt and XCR shell. So, I'm in search of the ideal base layer shirt. I like Patagonia's lightweight Capilene, but I'm still experimenting with various fabrics and manufacturers. I'm skeptical of Patagonia's silkweights as the stitching across the shoulders looks like it would be irritating with a big pack on. Do you have any wisdom to impart? Seyil Toronto, Ontario

Can you help me choose a boot for a trip to Argentina's Mount Aconcagua? I have summited several fourteeners in my La Sportiva Makalus without a hiccup, but I'm afraid Aconcagua is too much mountain for these boots. We plan on tackling the Polish Glacier route, and I was leaning towards a plastic double boot like Koflach or Scarpa. But, as usual, your input could sway me! Eric Palmetto, Georgia

I know nylon fabrics deteriorate from too much exposure to the sun, but does nylon lose its strength from old age? Is a sleeping bag that has been in storage for 20 years without seeing one ray of sunshine still "as good as new"? Are there both "good" and "bad" quality nylon fabrics, or are they all made equal? David Sparta, Michigan

OK, so jogging on the trail with a baby isn't safe. But, I would like to go backpacking after our baby is born. Are there any all-terrain strollers suitable for trails? I know there are baby carriers to wear, but dad still has to carry the rest of the gear, doesn't he? M. Dittman Cleveland, Tennessee

Will a space blanket attract lightning? Jeff Santa Monica, California

Now that hikers are supposed to filter/purify all the water they consume, I'm curious if ANY contact with untreated wilderness water is safe? Is it OK to splash water from a clear stre on my face and arms to cool off? Is it OK to jump in a clear lake for a swim? Would doing these things expose me to infection through ears, eyes, nose, ETC.? What about canoeists and kayakers who are in and around untreated water all the time? Mark Her Fullerton, California

My wife says that my regular reading of your column has cost us a fortune but I swear you've saved me money. Here's a chance to prove your worth, and much more importantly, prove me right. It's spring again, and my Mountain Hardwear Guide pants are suffering from a severe case of "glissade bottom." Are they totaled, or is there a way to economically repair this malady without tossing these wonderful but expensive pants in the trash heap? Secondly, I've tried to prevent "g.b." by pulling a pair of shorts over the pants, but to no avail. The shorts just ride up in to full wedgie mode, leaving me uncomfortable, and the pants largely exposed to the worst effects of snow abrasion. Is there some other method to avoid this in the first place, or should I just buy cheap pants for mountaineering? John Giles Carlsbad, California

Airlines have regulations prohibiting travel with fuel bottles and stoves, even if they're empty and purged. How can you fly to backpacking destinations with white gas stoves and fuel bottles? Do the rules make such equipment obsolete for travel where flights are involved? Fun Walled Lake, Michigan

I guessing that the tool that Bradford Hmar was looking for in a recent question is the Schrade I-Quip (http://www.schradeknives.com). It has an altimeter, barometer, digital compass, watch, whistle, mirror, flashlight, lighter compartment, screwdriver, knife, corkscrew, saw, and scissors. Jason Grech Decatur, Georgia

I'm really getting into ultralight backpacking, and I hope to do a through-hike of the AT or PCT in the next few years. I do all of my backpacking in the summer, but my Marmot sleeping bag is too heavy (and warm). What choices are there for a light, compressible bag costing less than $100? If there are no bags in this range, would you recommend removing some of the down from my Marmot bag to make it lighter? Tom Bellevue, Washington

Why don't sleeping bag manufacturers make the outer shells on their bags from the se materials used in waterproof-breathable jackets? Thanks for your time and answer. Steve Youngsville, Louisiana

My wife and I like to share a cozy sleeping bag while kayak camping, but we both own "pre-marriage" bags that don't zip together. What we want is one bag wide enough for two, made from synthetic material (since it might get wet), and with a temperature rating of about 20 degrees. Also, as we're both about five-foot-five, it would need to be on the short side. Is our only choice to have a bag custom-made? Andy Kirkland, Washington

So, after a year or so of ultra-light backpacking, my wife and I are starting to bring my son along, which means I need a huge pack to haul accommodation for three. Should I splurge and get a high-volume expedition pack like a Bora 95 or Gregory Denali, or are one of the new generation of external-fre packs (like Kelty's 50th anniversary edition) better value? We'll be mostly on trail, but I'm not sure if the lower-priced packs will provide enough comfort over a few days. Robert Granada Hills, California

I guess this might be more of a biological or physiological question than a straight gear question, but I notice that when I sip water from a CelBak, I have to "go" less than if I take bigger yet less frequent gulps from a water bottle. It seems that even drinking a full 70 ounces from my CelBak, compared to a quart from a bottle, is easier on my bladder. I just imagining this? Does the body better optimize water that's sipped slowly? Bill Bedford, New Hampshire

Not really a gear question, but can you tell me about all the pre-packaged trail food on the market? What have you tried? What's the best? Also, do you know of any Web sites with a good selection of trail recipes, especially vegetarian? Melissa Greenwood, Delaware

I'm planning on through-hiking the Pacific Crest Trail and would like to keep my pack weight as low as possible without sacrificing comfort. When I through-hiked the Appalachian Trail in 1990, my pack weight was around 50 pounds, including food and water. I have heard that ultralight packs are not very comfortable with loads over 20 pounds. Can you recommend a lightweight backpack for my hike? Cliff Ashford, Alabama

I'm gearing up for an ascent of Denali in May 2002. Could you advise for clothing and size of compression sacks appropriate to bring? I weigh 114 pounds so I want to minimize what I have to pack. Jeanne Stawiecki Charlton, Massachusetts

A friend and I are planning an attempt to summit Mount Shasta this summer. Neither of us owns an ice ax or crampons and we plan to rent those items when we get to the area. But recently I've been looking at Kahtoolas, which are kind of "crampons light." They're aluminum with no front points and touted as compatible with everything from hiking boots to running shoes. Looks like they might be adequate for a trek up Mount Shasta. Also, I might get some use out of these in future winter hikes. But they are north of 100 bucks (in the same territory as some entry-level crampons). Do you have any experience/insights on Kahtoolas? Mitch Thompson Shaker Heights, Ohio

As a frequent trail runner, I looking for a backpack designed with running in mind. I would like something with ple storage for additional layers and supplies, certainly larger than a lumbar pack. Any suggestions? Connor Ann Arbor, Michigan

What's the best tent for winter camping? I'm interested in a two- to three-person tent that's lightweight, packable, and available at a low price. I will be spending time in northern Massachusetts and the White Mountains this winter. I've been looking into single-pole shelters like the Black Diond Betid ($98), and while comfortable with not having a sealed floor, I worry about water seeping in. Do these tarps really work? Are they reliable? Is it possible to find a reliable four-season tent under $200? Boaz Sender Boston, Massachusetts

I need to find a tent for winter camping and mountaineering. Living in Oregon I intend to stay within the Cascades. I have narrowed my search to the Fusion 2 and the Fury 2, both made by MSR. They fall into the same weight/price/size category. The Fusion is a convertible tent while the fury appears to be a four-season tent. Given the conditions I'm expecting to face, which tent would be the ideal choice for me? Is the Fury too much tent, is the Fusion too little? Is there another tent that you would recommend? Kevin Portland, Oregon

Much of my clothing made with high-performance fabrics, such as Coolmax, states that you should not use fabric softeners or dryer sheets. Why is that? If they are accidentally dried with a dryer sheet will they return to normal after the next wash or are the performance aspects ruined? Joe Helm Canal Winchester, Ohio

I looking for a two-way radio. I don't know much about them and need some advice on a dependable and weatherproof model for outdoor activities such as camping and boating. So it would need to be. I hear you need a license for anything that has range of over five miles and would like to avoid that. KJ San Diego, California

I'm interested in buying a new kayak for touring and open-water paddling, but one that could also take a little whitewater action once in a while. What would you recommend? Jeff Midland, Michigan

My girlfriend has had problems finding a boot for her narrow foot. In particular every boot she has tried so far has caused blisters on her heels due to slippage. Can you suggest a backpacking/hiking boot for women with narrow heels? Jon Rauer Charleston, West Virginia

I have an opportunity to buy a Tempest 23 tent from The North Face (retail $675) for $400. It is brand new and it looks bombproof. I have asked all over and searched the net for info about this tent and have come up empty. I heading to Mount Shasta in June and would like a good mountaineering tent. On the other hand, I also need to upgrade my old duct-taped, three-season tent. I not sure what to do, buy this single-wall tent and buy a good three-season, or look into a convertible tent. I don't want to miss out on a good deal. Brian Holt Detroit, Michigan

Do you have any recommendations for headlamps? I'm a casual camper intrigued by the new LED lights. The battery-/bulb-life is amazing, but are they bright enough to be worth the purchase? Michael J Ogden, Utah

I planning a trip to Belize this spring. I own a MSR Superfly and have already used it many times. Can I bring the stove—minus fuel canisters—on an airplane? I really don't want to purchase another stove. Brett Skraban Chicago, Illinois

I preparing to go on a seven-day backwoods trip to Glacier National Park, and I'm trying to determine what stove to use. As I like white gas (I have an old Optimus), how much fuel do I need if I'm cooking three times a day? I will probably upgrade to a Simmerlite or possibly a Zip Stove depending on your answer. John Cden, Maine

What's a good trail-running/adventure-racing shoe for an over-pronating runner like myself? I need to buy a new pair of shoes quickly! Rob Indianapolis, Indiana

My trusty 35-year-old Svea stove is in need of a new gasket for the cap. I've made one, but the material I used is too hard to effect a good seal. Is the real thing still available? I also need the cleaning needle. Is that available? Kent Tracy, California

In September I'm headed to a lodge in the stey Amazonian rainforest, so I'm looking for a poncho or raincoat that will be light, packable, waterproof, breathable, and cool. But everything I've looked at so far has liners and seems more suited for warmth in mountain winds than for a humid rainforest. What's my best bet to stay both dry and cool? Patrick Jonesboro, Arkansas

I need a waterproof tent. I spend most of my time outdoors in fall and winter, and two REI tents and one from The North Face have failed me. The problem isn't water coming in through the ses; it is coming through the fabric itself, including the rain fly. I've even tried, unsuccessfully, to spread silicone caulk on the rain fly. Can you recommend a tent that will stay dry even if a fire hose is turned on it? Jeff Moscow, Idaho

I recently saw The Seat from ERGO, LLC advertised. The makers claim that this seat does away with numb-butt syndrome and sexual dysfunction (real important). Can you confirm or deny these assertions? Dennis Hilton, New York

I'm looking to buy a fly-fishing rod for some of the smaller Rocky Mountain stres. Any suggestions on where I can get a decent rod that will break into small packable pieces? Matt Albuquerque, New Mexico

How can Limmer and other high-quality boot manufacturers send your boots to you sight-unseen, without ever seeing your "dogs," let alone sizing them? Jim Coeur d'Alene, Idaho

I contemplating through-hiking the Pacific Coast Trail, Continental Divide Trail, and Appalachian Trail in succession and need info on the packs made by GoLite (based on Ray Jardine's designs) and Wild Things, and the tents by Warmlite. I have not had the opportunity to test any of this ultralight gear. I know you have answered before about the philosophy behind the "Ray Way," but I after actual gear tests of these products. I feel GoLite's packs (the Gust or Earth for me) would be high quality but haven't heard anything about them. The Wild Things AT may give the Earth or Gust a good fight but the price is higher. Any thoughts as always would be absorbed and contemplated. Scott Running Springs, California

What's the best handheld altimeter for mountaineering? I have looked at the Suunto, Brunton, and Thommen models, but not sure which has the best features for high-altitude Alaskan climbing? Ron Toronto, Ontario

Checking out this season's gear, it's clear outdoor clothing is becoming truly high-tech; we can travel lighter and more comfortably than at any time in history. To tell the truth, I feel kinda sissy not having to grin and bear the cold and wet anymore. Are we reaching a point where technology only offers incremental returns beyond what it can do today? Will we ever see paper-thin insulating jackets, or do the laws of physics prevent a future of sci-fi outdoor clothing? Ross Reading, California

How do I get the nasty smell out of my old footwear? I like to buy quality boots and shoes that will last a long time, but inevitably, long before they are worn out, they start to stink (my feet tend to sweat a lot). Any suggestions as to removing the offensive odors and bringing these old friends back into service? Bill Charlottesville, Virginia

I currently own a pair of Tecnica backpacking boots that should be well broken in after 200-plus miles of use. However unless I pre-treat my heals with second skin, I end up getting heal blisters. I think this maybe due to my high foot bridge and the boot's lacing system. Any recommendation on a boot that might work better for me? No Name Given

After straining our eyes for years (and believe me, the years have gotten to me) my wife and I have decided to consider a spotting scope for our field trips. I new to scopes and confused at to the benefits between a straight versus angled lens and as to what optical power is most beneficial for nature viewing. Can you recommend a few bombproof spotting scopes (we take our fair share of spills and falls on the trail) with quality optics to view and appreciate nature with. Mr. Magoo Galveston, Texas

I need to buy a pair of boots that will work well on Mount Rainer and Mount McKinley. They need to be waterproof and crampon compatible. I don't need them to be overly heavy but they have to keep frostbite away in a storm. What are some options for both plastic and leather boots? Jeremy

Are soft shells for real, and can they adequately replace a 300-weight fleece as an insulating layer for mountaineering? Would they give me the benefits of a windproof, waterproof, and breathable layer before the hard shell is donned when the weather gets really nasty? Matt San Ron, California

What's the deal with siliconized nylon? Smaller companies like Integral Designs, Six Moon Designs, and Wanderlust Outdoor Gear are making extraordinarily light tents and tarps out of this stuff, yet the Sierra Designs and Mountain Hardwears of the world aren't using it. I understand it doesn't breathe well and thus condensation can be a problem, but is that a big deal? In other words, what are the arguments for not using it? Kevin Larkin Blacksburg, Virginia

I in urgent need of a warm sleeping bag for use on an upcoming desert running race I entered in, the Marathon des Sables in Morocco. Although this conjures up visions of heat and sleeping under wispy silk fabric whilst warm winds blow, the reality is that at night, temperatures can plummet to freezing. I'm not too concerned about cost and need a bag which is at least good for about 32 degrees, and most importantly, LIGHT!! It has to be carried and raced with for over seven days. Please recommend waterproof varieties or appropriate techniques as it can pour. Dio Wong Hong Kong, China

My summer bag is an Integral Designs Andromeda Strain (40-degree, Primaloft); my three-season sack is the North Face Cat's Meow (20-degree, Polarguard Delta). Both are sweet bags. My question: can these bags be combined (summer bag inside three-season bag) to make a winter bag? Will I gain much, or will the inside bag be unable to loft up and therefore not provide much additional benefit? Thanks! Bill Stell Charlottesville, Virginia