Fall's new casual boots feature a tried-and-true friend: durable leather. X-Ray 'em, however, and you'll find athletic-shoe cushioning and the sole and support of a hiker. Because you know what they say: real beauty is more than skin-deep.

Like travel itself, the latest gear for the road is full of wild surprises

I do quite a lot of bushwalking in the Japan Alps and have been carrying my Canon SLR with standard lens, and occasionally an extra telephoto lens—all told, a hefty load. I'm not such a serious photographer to need all that extra weight, but I would like better photos than a disposable or compact can produce. After some research I had decided to splurge on a Contax T3, but then I saw a new Pentax SLR—the "*ist"—that weighs only 335 grs (presumably that's the body only). So, with a matching lens, it still comes in at about half the weight of my current camera. I presume the optics are plastic, hence the low weight. Which would you choose? Excellent fixed lens or zoomable plastic? Dian Tokyo, Japan

During a week's hiking around the High Sierra Cps of Yosemite, my backpack began to reek! Even though I washed myself and my clothes regularly, my husband, who is normally a very sweet man, insisted I hike behind him so as not to be asphyxiated. How, oh how do I get the stench out of my backpack straps?

If a guy was headed to Denali in May, and asked you to compare the Marmot 8000 Meter Parka with the Feathered Friends Rock & Ice Parka that you used, what would you say? And, since I very good-looking, would you like to use my photo at the head of your column and tell people it was you? Bob Reno, Nevada

I recently completed a two-week, 96-mile trek in Alaska's Brooks Range. I thought that I was traveling as light as possible until I encountered a couple of wandering hikers who were carrying external-fre backpacks fashioned with titanium fres and Kevlar fabric. Their packs, from Cp Trails, weighed at least half of my Longbed pack, and mine was smaller. After returning to civilization I immediately visited the store where they told me such packs could be purchased, but the sales staff gave me that "what planet are you from?" look upon hearing my tale. Assuming they are the ones from another planet, can you help me find a super-lightweight pack weighing less than four-and-a-half pounds, with up to 6,500 cubic inches of capacity? Is there such a creature still being made out there? Fred Kodiak, Alaska

What's the deal with "fly-only pitching" options with tents? My partner wants a roomy, comfortable double-wall tent for two (she likes The North Face's Roadrunner 2). However, I also want a lightweight single-wall tent that's easy to pitch for solo camping and just traveling light (something like a Bibler Megid or GoLite Den 2). Will a tent with fly-only pitching meet both needs? Jes Sydney, Australia

I have some questions about a backpacking trip around India, where weight will be a consideration. We need a unit for recharging digital camera batteries (possibly with surge protection), as well as a lightweight but intimidating-looking lock and chain to secure our packs to seats and poles on trains. One more thing: I'm looking for a multi-climate sleeping-bag liner. Thanks much! Sue Boston, Massachusetts

I'm headed to the Okavango Delta in Botswana for six months through a job with Conservation International. I not a very experienced photographer, so can you recommend a reasonably priced camera that'll take great wildlife photos? Todd Baltimore, Maryland

I planning a climbing trip to the Yosemite Valley in a few weeks, and I was wondering if you have any recommendations for a hydration pack I could use while climbing. I would use it to also carry a small headlp, rainjacket, and a few energy bars. I looking for something low profile that will not get in my way while climbing. Anything fit the bill? Alan Locust, New Jersey

Last year I bought a Specialized Sirrus Sport hybrid for road biking, with which I'm very happy. My brother's looking for a new bike, so how does something like the Marin ALP line of bikes, particularly their Highway One, stand up against the likes of my Specialized Sirrus? A bike mechanic told me that Marin's star is waning, and that you are paying for their ne. Thanks for your insight. I've actually set up my Internet browser to open your column as my personal homepage, and have used your advice more times than I can remember! Patrick Chicago, Illinois

So everyone I know agrees the Marmot Oracle is a fantastic storm protection jacket. But sometimes you have to take the advice of longtime friends... and throw it away because they are not the Gear Guy. I want an ultralight jacket to throw in my pack while hiking. I bought my wife the Marmot Oracle, which she loves, but what do you think about products using PacLite such as the GoLite Phantom Jacket, or the Marmot Osprey? I already have an Arc'teryx Beta AR, but is that light enough, or would PacLite be worth it? Jeremiah Eugene, Oregon

Lieber Ausrüstungmensch: Looking at the change of seasons and your report on the latest and greatest in the gear world, I'm trying to come up with a clothing strategy that maximizes economy of budget and weight. I'm a keen hiker currently living in Germany (near the Alps), but who will be moving back to the East Coast of the U.S. (Smoky Mountains!) soon. I want a system that will cover me when it's warm, cool, and wet. Should I go with a fleece-plus-shell combo, lugging around the deadweight when I'm not using it, or should I buy one of the do-it-all soft shells? Patrick Frankfurt Main, Germany

Now that the venerable Patagonia Ice Nine ski bibs have been discontinued, what do you recommend in their place? I want something similar: waterproof-breathable, light but durable, great features. However, I've read not very complimentary things about The North Face's Gore-Tex XCR bibs. Richard Oak Ridge, Tennessee

Which do you think would be better for a backcountry winter camping trip in Yosemite: snowshoes or a ski like the Karhu Morph (which looks like L.L. Bean's Boreal and features a built-in climbing skin)? Tom Marina del Rey, California

Dear Gear Guru, I'm thinking about bringing my Labrador camping with me, but don't know if he needs special gear. I have a two-person tent, and there's no way my wife and I could fit him in there with us. I don't think he'll be satisfied sleeping in the tent's vestibule either. What should we do to make sure he's happy and safe? John Bloomington, Indiana

For the last five years, I've been lugging around a seven-pound Dana Design Stillwater pack. But recently, I've seen the "light" and have gone lightweight. Can you recommend a solid, 4,000-cubic-inch pack that weighs less than four pounds? I was looking at the Osprey Aether 60 and the Mountainsmith Auspex, but which would you recommend? Thanks for always being the "go to" guy when it comes to gear. Jake Irvine, California

I have a medical condition known as Raynaud's, which basically means that I have real problems staying warm in temperatures below 50 degrees. This past winter was a killer for me. Unfortunately I can't hole up inside during the winter as my 100-pound insulated dog needs to walk (and loves the cold). What do you think would work best for me? I assume down, but the women's down parkas don't seem to be that warm. Faith Reston, Virginia

What does one do when his hero lets him down? Last fall you spoke highly of the St. Moritz Pathfinder TI watch. Well, let me tell you, the Gear Guy is fallible. This watch has been a huge letdown. The "glow factor" of the numbers is terrible, the alarm is barely audible, and the service is less than acceptable. I sent it in for warranty repair for its water resistance, being sure to mention the other factors, and the service was very slow and they never even addressed my other concerns. I think you may have made an error! (I know, hard to believe.) Tim Moose, Wyoming

My husband and I are having an argument about our 20-year-old down sleeping bags. The bags in question are Blacks Icecap XL mummy bags. I've recently being doing some fall camping and find that I get quite cold some nights, leading me to surmise that these sleeping bags have reached the end of their days. My husband says it's just my age, as he doesn't find them cold. Now I know I shouldn't bother arguing with him and just go out and buy myself a new sleeping bag, but I want you to tell him that down sleeping bags do "die" eventually. Can you back me up? Carol Port Moody, British Columbia

I was rock climbing in Australia earlier this year when I fell and wrecked a lumbar disc. I'm having surgery to decompress the spinal nerve in a couple of weeks (a lumbar microdiscectomy), and I'm itching to get back into trping (you call this "hiking") and climbing and so on. Since physiotherapists don't know much about backpacks, I'm wondering if you can help me: Is there a backpack that is better for your back (i.e., one that doesn't compress your lower back too much)? I currently use a fairly simple 60-liter New Zealand-made pack by Cactus Climbing. Karen Wellington, New Zealand

Thanks for asking the Gear Guy a question. Stay tuned to the Gear Guy’s column for your answer. He should get back to you in about a week. Of course, while he’d love to answer everyone’s questions, he’s so busy testing equipment that he…

Is it 100 percent necessary to dry a tent in the sun after a few days of camping with heavy mildew? Miles Rowland Adelaide, South Australia

What are the differences between the gas combinations of various isobutane canisters sold by different companies (MSR, Snowpeak, Brunton, Gaz, Primus)? And how do they affect the performance of various stoves and lanterns? Garrett Tempe, Arizona

I moving to Switzerland for two years, and I want to buy a stove. I've heard that white gas cannot be found in Europe. Then again, if I buy a canister stove, how can I be sure I can buy the right type of canisters? I have considered getting the MSR Superfly because it's compatible with almost every type of canister. What's your take on my situation? Jay Springfield, Massachusetts

I'm looking for a raincoat that is lightweight and very packable, while also being waterproof and fairly breathable. I travel internationally a lot and need something that will look decent while in a major city yet also work while on the trail the next day. I'd like a jacket that doesn't have huge zipper covers or too many excessive components. I want something simple in a neutral or dark color so I don't stand out in foreign countries as much. Any suggestions for a durable, multi-functional, and ultra-packable raincoat that is lightweight and not terribly expensive? Jonathan Achter Minnetonka, Minnesota

Are Galibier boots still made? If so, where can you get them? No Name Given

Oh great and powerful gear wizard, I've gone and done it now. I have mildew—the brown spots AND the powdery green stuff—on my Bibler tent and Marmot sleeping bag. Please tell me I didn't just sink $1,500 worth of gear in the course of one monster rainstorm. Is there anything I can do? Julie Collinsville, Connecticut

It is better to have a full-suspension mountain bike or will a hard-tail with a suspension seat post be sufficient enough for a smoother ride? Paul G. Fort Wayne, Indiana

What's the best two-person tent for under $300? Tom Ireland

I recently purchased an Annapurna tent from Mountain Hardwear, because I'd like to start getting outdoors on more than day trips. However, the guy at the shop was reluctant to sell it to me, saying it was "junk" because it's a single-wall tent. What's the difference, and what are the advantages and disadvantages of this style tent? Lucas Denver, Colorado

Man, I confused! I want to purchase a synthetic-fill jacket for an upcoming canoe trip in Big Bend National Park. But it seems that all the major brands employ a different type of fill, running the gut from Polarguard HV and 3-D to Heatshield and Primaloft. So, Doug, I turn to you for expert guidance. Which is the best synthetic fill for warmth and compressibility? If there is not a "best", then what are the advantages of each? Finally, what jacket would you take? Steve Hurst, Texas

I'm so frustrated by how much boot sizes vary, even within the se model! I'm a woman, narrowing my options to begin with, and I'm a woman with a narrow foot. I've tried several different La Sportiva and Salomon models, but still can't find the perfect fit. I don't have the option of trying boots on in stores as nobody around here has anything in women's sizes, so I've been mail ordering. Can you help me? BJ Guilderland, New York

I bought a Canon Rebel 2000 kit in July to take with me to Alaska. I fully expected the picture to be crystal sharp—you know, the azure sky with white clouds and glacier and stuff. But after I came back and got them developed, I was very disappointed. Seems like the pictures are pretty grainy (like those taken using an APS camera), especially those sky/clouds and glacier ones. I used 200 speed Kodak Gold and the weather was sunny, but not too bright. What can I do to make the pictures turn out better when I go to AK again next year? Should I change the lens, the film, or the camera? If so, could you make some affordable suggestions? I'd rather not change the camera, unless of course, it'll give me great advantage. Oh, I got them developed at Ritz Camera, if that helps. Maybe their equipment just can't handle it. Please help me out here, I'm desperate! No Name Given

Because I sweat at a moderate activity level in cold temperatures, my insulation gets dp and looses it effectiveness. Layering and reducing exertion does not eliminate the problem. I a human fire hydrant. I have heard that vapor barriers could really help. Any suggestions on what to look for and brands? Ed Eugene, Oregon

I have a weakness for eggs. Love 'em. Don't care what they'll do to me, I have to have them. In the Navy, eggs are coated with a thin wax layer that will keep them fresh for about a month. Can I get these eggs somewhere, or can I do this myself? Also how long will a raw egg stay good when unrefrigerated? I would love to enjoy my eggs no matter how long I may be on the trail. Jes Russellville, Arkansas

I have a Gore-Tex Mocha jacket, which is about seven years old and seems to repeatedly lose its water repellency. I have treated it with Gore Revive-X several times, but there are only a few areas on the coat where water beads up, and even then not for long. As a result, I often feel clmy if it's raining hard, although I don't think I'm actually getting wet from the outside. Does Gore-Tex have a lifespan, after which it's not that great even if you keep treating it? Basically, is it time for the old Mocha to be replaced? Karen Wellington, New Zealand

When I was getting ready to apply mink oil to my two-year-old Asolo boots, I found the inside lining around both heels had split and the fo lining was coming through. These boots haven't seen extensive service, only being worn for school. The store where I bought them is out of business, so whom should I contact to get them fixed or replaced? Dennis Cedar City, Utah

So, what exactly is Scotchgard, and can I spray it on fleece? Terry New Kingston, New York

I have been looking for a boot that can do it all. From aggressive summer day-hikes to light winter mountaineering in New England. I've been reading all your past articles and the Boreal Bulnes seem to be the ticket, though they seem not to be made anymore. I did manage to find an online retailer with the Bulnes at a great price but I now have a dilemma. How do I pick a size for a boot I can't try on? Since no stores currently carry this boot and the online retailers have questionable return policies, what would your Gearness do? If you wouldn't buy online, do you have any recommendations for similar boots? My anxious feet await your guidance! Matthew Mendonza Boston, Massachusetts

I'm looking for a fleece that is both windproof and breathable, for use when cycling, hiking, and maybe skiing. What fleece would you recommend for someone who has just had all his stuff stolen on a bike trip through Poland (meaning: my budget is limited)? Matti Kiel, Germany

Can you recommend things to look for before purchasing a used bike? I interested in several Trek models and have found a couple of used bikes that appear in good shape. I would really love to save a few dollars by buying used and getting more bike for my buck. Carter Arlington, Virginia

Any recommendations for a two-person backpacking tent big enough for a six-foot, five-inch, 250-pound camper? I already have a Sierra Designs Clip Flashlight two and it seems a bit small for just one person (me), especially after more than two nights of foul weather. Jim McGowan Charlotte, North Carolina

I'm planning on hiking Vermont's LT, and because of past knee problems I'm trying to pack as light as possible. I've been considering buying the Mountain Hardwear Phantom sleeping bag, but I'm concerned about its down fill. Any thoughts? How effective is the water-resistant coating used on the superlight bags? Neil Westport, Connecticut

I am looking for a tent that will repel dew, especially as I hate the damp feeling that comes from wet grass. Which tent do you recommend? I don't do much camping, but I do like to be comfortable when I do. Tara Bowler, Wisconsin

I starting to gear-up in preparation for climbs of Mount Baker and Mount Rainier this summer. I have an older Princeton Tec headlp that I use for backpacking, but can you recommend a good replacement? Are any of the newer LED headlps good enough to use when climbing? Kleet Renton, Washington

I have Scarpa T1 boots and have noticed that my ski edges are going to massacre my boots if I don't protect them. A solution I have heard of is to wear "supergaiters" with either Kevlar or other sturdy material on the instep to protect the inside of the boots. Unfortunately Black Diond (she on them) no longer makes a supergaiter and the Outdoor Research X-Gaiter is overkill in that it is expensive and so insulated that it will cook my feet. Any advise? Bill Hirshberg New York, New York

I'm staring down the barrel of a long, cold, wet winter, which will put a crimp on my outdoor bicycling. Now, I can't afford a house big enough to install a velodrome, so I'll need to purchase either a trainer or rollers to ride my bike inside. Should I fear the rollers? Will I need to put fo padding all around them? Will true believers mock me if I buy a trainer instead? Glen Novato, California

I'm a student who's planning a summer road trip to visit some neighboring states and maybe even Canada. I hope to leave the truck for a few days at a time and do a little backpacking, so I'm looking for a pack. Remember, I'm a starving college student, so nothing too expensive please! Mike San Luis Obispo, California

I have a new Dana Design Shortbed pack, but after packin' for a long ten miles, I noticed that my hands and fingers were swollen. Was this just a bad pack fit, or was it too much weight for the long haul? Ray Kuna, Idaho

I have a Gregory Palisade pack and love it. A number of recent comments and reviews of the Dana Designs Terraplane pack have suggested it is the best pack on the market. However, I find the price of over $400 extreme. Is there something inherent in this pack that would suggest such a premium over the $200 to $300 internal fre packs in its category? David R. Eitemiller Colorado Springs, Colorado

Can you recommend a sturdy sack that will protect a backpack (with tent and sleeping pad strapped on) when it's checked as luggage on an airplane? David Oakland, California

Dear Gear Guy, can I extend the life of running shoes by using Dr. Scholl's gel insoles? Will they improve the comfort of hiking boots? By the way, I use orthotics. Gary Goins Denver, CO

Where can I find a waterproof video camera, for filming surfing and other stuff? Luke Ft. Myers, Florida

We know your favorite sub-$500 camera is the Yashica T4 Super. But, what are your favorite point-and-shoot cameras for $500 and above? Roy Boston, Massachusetts

I've collected the very best ensemble of outdoor gear, but I still require one last item: sunglasses! Price is no object, but quality is. I need the best all-purpose outdoor fres that are compatible with prescription lenses. Cebe comes to mind, but do you have any other suggestions? Paul Boulder, Colorado

What's the difference between a bivy bag and a tent? Which would be a better investment (I'm thinking of room for two people here)? Noel Muscutt Louisville, Kentucky

I've recently signed up to do the San Francisco to Los Angeles Aids Lifecycle in May. I have done some mountain biking in my past (novice level) and taken spinning classes for years, but road biking is new to me. I decided to buy clipless pedals and tried out my shoes (Sidi) in a spinning class a few days ago. I was in pain—my calves crped to a point where I thought I would have to putate—and the outer side of my left foot was aching. What is going on? Are the shoes too small/narrow? How should I go about finding the right pair without wasting a ton of money? I really need advice. Joe Ashleigh San Francisco, California

I've read that good husbands buy gifts for their wives after the birth of a child. So, being a good husband, I'm thinking of getting a cyclocross bike—for me. Hear me out. Because of the recent arrival of our beautiful little miracle, I'm not going to mountain bike (that's one bike) or commute (that's another) as much as I used to, and probably won't be doing a whole lot of road riding (a third bike I was hoping to get), either. Plus, the missus would like me to pare down my belongings to make room for strollers and such. So, can I get by with one cross bike (sub $1,000)? I'm sure my wife will thank you. Michael Minneapolis, Minnesota

I would like your opinion on the Grigna 2800 trekking boots by an Italian company ned Armond. My main concern is the long-term quality of the boots since Armond is not a well-known brand and their boots cost about a third less than those made by more popular companies. I intend to trek to the top of Kilimanjaro this year. Ngoc Dung Phung Montreal, Quebec

What do you think of the new mohair socks on the market? Are they as warm as wool socks? Are they itchy?" Alexander Do Toronto, Ontario

Will salt water break down Gore-Tex and other waterproof-breathable fabrics? (I've heard tales of salt spray drying in the fabric and grinding away at it from the inside like tiny saws.) Is there a better choice in outerwear for kayaking and sailing on the Maine coast? Stephanie South Thomaston, Maine

I'm completely new to backpacking and worried about buying gear from just anywhere. Here in Canada, MEC (Mountain Equipment Co-op) supposedly carries nothing short of the best quality equipment and the thought of going to just one place for all your needs sound really nice. Would you, with all your experience, trust MEC for all your needs as much as everyone here seems to? Or do I have to shop around for everything separately, looking for reviews and such, and then spend tons of money in U.S. stores due to the crappy exchange rate? Your answer is greatly appreciated. Tatiana Calgary, Alberta

Is there a watch out there that is a dive watch and also an altimeter watch for skydiving? Ryan St. Petersburg, Florida

I enjoy weekend hiking and overseas travel. At the se time, I want to look good when I dress casually. Because of this, I spent $400 on a Patagonia XCR Gore-Tex jacket when Patagonia opened its first branch in Hong Kong last year. It's a very expensive outfit, but I do like it. However, after reading all your gear recommendations, it seems I could have bought something similar or even better. So, I'm now thinking of buying a fleece jacket for cold weather. Do you have any cheaper recommendations? June Hong Kong

Do you know where I can buy one of those Mountain Hardwear sleds? Who else makes sleds for hauling gear? Thom Salt Lake City, Utah

I'm going hiking on the West Coast Trail, and my boots have Vibr soles that are very slick on wood when it's wet. Since it constantly rains on the West Coast and I'll be traversing many wooden bridges and ladders, I was wondering if you could suggest a boot with a sole better suited to wet conditions. Dan Ottawa, Ontario

I work in the movies, and I need to find a good photo of a crevice ladder and then purchase one in Canada. Can you help me? The Props Guy Whitehorse, Yukon

Hey Gear God, Help me find the perfect scrambling boots! I love my old Asolo backpacking boots. They never needed breaking in, and after years of conforming to my feet, they're about as close as you can get to slippers and still be boots. Alas, they don't edge worth a darn. I need a 3/4- or full-shank boot that is made for wide, high-volume feet and is crampon compatible for alpine scrambling. I bought a pair of Solomon Super Mountain 9s online because they were a great price. Dumb move! They perform great and are the right length but they squeeze my feet like sausage casings. Is there a happy medium between my slipper Asolos and those sadistic Solomons? Julie Busse Seattle, Washington

Help, Guru King! What's the best trail running shoe I can use when wearing a 30 pound pack and covering around 20 miles a day, on and off trail? I use Vitesse shoes right now, but the bottom of my feet get sore from traveling on rocky terrain. I have been looking at a number of brands and have tried calling their product develoent divisions—but it's hard to contact those folk! Peter Belmont, California

I just bought a pair of glacier glasses on eBay that don't have a brand, but they do have side shields and the lenses seem quite dark. However, I don't know how powerful they are at blocking ultraviolet light. Would these be suitable for a trip to Mexico's Pico de Orizaba? Eric Plymouth, New Hampshire

For the man who has every item of biking gear imaginable (judging from the mountain bikes, panniers, and lights littering our garage), what's the perfect Christmas gift for my husband, one that will even have Santa's elves guessing? I'm looking to spend up to $100. Janet Atlanta, Georgia

I a member of Vail Mountain Rescue Group and have been nominated the "gear girl" in charge of finding a good windstopper fleece jacket for our te. We are looking for something comfortable, flexible, and warm, but that's not too bulky and stands up well in the cold (one of our members complained that the Lowe Alpine version gets very stiff in the cold). Any suggestions? Leslie Vail, Colorado

I'm a middle-aged backpacker trying to lighten my load. I'll will be "climbing" Mount Shucksan in Washington this summer with a guide. A member of our group maintains that Stubai makes a pair of multi-purpose, lightweight crampons that are great for any boot. I'm wearing Asolo Fusion 95 GTX, which I really like, and these crampons are supposed to be okay for these boots. At best, I'll only be doing one climbing trip per year, but would like a pair of lightweight crampons for crossing the occasional snowfield in the Northwest. What are your thoughts about the adequacy of these crampons (and boots) for a non-technical climb such as the one on Mount Shuksan? Don Uslan Seattle, Washington

What's the deal with waxed cotton raincoats manufactured by Barbour in England and Filson in Seattle? Although they don't breath well and would not work for high output activities, I have run into users who rave about their water repellency and durability, tempting me to buy one for around town and short hikes carrying minimal loads. Steve Albany, New York

While hiking I've noticed that many hikers are now using alcohol stoves. Is this a better way to travel? Also do you know where I could find instructions to make my own alcohol burning stove? Chris Smithsburg, Maryland

I'm planning a trip to Tibet, and I'm looking for a bag in the zero to ten degrees Fahrenheit range. In addition to struggling with the age-old down versus synthetic issue, I'm also confused by the suitability of those Sierra Designs' down bags that include add-on top layers, such as their Buddy Rad. (They even suggest stuffing clothing in between the layers if it's cold.) Will this setup keep your whole body warm if the add-on layer only goes on top? Overall, I place great value on lightness and even more on compressibility, but I'm always wigged out about getting down wet. Matthew Boston, Massachusetts

I'm in the market for a new sleeping bag and would like to give a down bag a try, mostly because of space and weight issues. I'd be using it primarily as my summer bag, so a 30-degree rating should be enough. Do you have any advice for a good down bag? Andy La Crosse, Wisconsin

I've been looking for a zero- or minus five-degree sleeping bag for use in early spring, but found that nobody makes any quality down bags for women. What's up with that? All Western Mountaineering bags are huge, while Feathered Friends makes only two women-specific bags, but they're rated only for 10 and 20 degrees. I just wonder, does the outdoor industry think that every outdoorsperson is some huge guy with wide shoulders and skinny hips? That has got to change! Anyways, for the problem at hand: I'm five-foot-six and on the lean side. What's a quality down bag that won't require me to expend extra energy in order to heat up excess room inside the bag? Jennifer San Diego, California

I'm planning a mountaineering trip to Bolivia in June. I have a pair of Koflach Degre boots, which have been fine on Mount Hood and when winter climbing in New Hampshire. Will these be OK for climbing Bolivia's 19,000-foot peaks? Do I need Alveolite liners? Brian Augusta, Maine