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

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

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'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

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

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

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…

I new to whitewater kayaking and was wondering about a practical, fairly inexpensive way to get into the sport. Jimmy Cullowhee, North Carolina

Oh Great Gear Voice of the Heavens, What's a nice, dry, two-person, three-season tent with two doors and vestibules? My current tent is a Sierra Designs Orion AST. It's a very well built tent and stayed completely dry in a very wet trip to Deer Lake in Olympic National Park. I like being able to use only the rain fly and ground sheet as well as the window in the fly. The problem is that the very slanted door lets stuff collect in the tent entrance and makes zipping and unzipping tough. It also makes the vestibule useless for anything but boots. I hope to get a new tent with two doors that are straight up and down, but don't want to lose the high quality and rain-proofness. I willing to give up a little in weight if I could get a ground sheet that covers the floors of the vestibule as well. Chris Barnes Bremerton, Washington

I've been skiing for years and haven't needed to buy new thermal underwear in a long time. But now that I'm ready to replace it, several new materials are on the market. I know I don't want cotton, but what about silk? Wool? Or should I just stick with polyester? y Kuntz California

I'm looking for a mountaineering boot for tackling some of the Lower 48's fourteeners. I've reviewed the Koflach Degre and the Asolo Guide, but I'm also interested in some of the newer leather boots, like the Scarpa Cerro Torre Thermo. Have the new insulated leathers finally become an acceptable solution, or should I stick with doubles? Matt San Ron, California

Are candle lanterns safe to use in tents for light? Obviously you'd want to keep an open fle away from the tent walls, but are they as safe as a battery-powered lantern? John Bergquist Corvallis, Oregon

I'm 55 and like to ride bikes. Here near Lake Michigan in late spring, it's often sunny and cool. I see a lot of die-hard bikers wearing tights, but I'm not interested...is there anything else I can wear? I tried tennis warm-ups, but they're too slippery on the bike seat. Stu Highland Park, Illinois

What's the best crampon for the LaSportiva K3 boot? Can I use semi-rigid crampons with them to climb vertical ice? I need crampons for that and glacier approaches but am afraid that if I get a fully rigid crampon I will get to much balling-up effect with the snow. Joe Roop Prescott, Arizona

I have a 15-year-old Peak 1 stove that still works great. I was wondering if I could use cheaper unleaded gasoline (about half the price of Coleman fuel) without blowing me or my friends up. Or do I need to get a newer model made for both white gas and gasoline? J. D. Craft Lancaster, Ohio

I have a simple question. I dried my jacket on a high temperature in the dryer. Everybody tells me I shouldn't have done this, but how will it affect my jacket? Adrien Lancaster, United Kingdom

G'day Gear Guru, I've noticed a couple of innovative water-purifiers that incorporate the filter mechanism directly into the cap of a light, convenient, and squeezable water bottle. Models by Orinoco and SafeWater Anywhere make lofty claims of filtering and purifying the nasties better than traditional pump-style filters; the SafeWater model even has a filter cap that fits onto Nalgene bottles. Is there any point to lugging around our old pump filters anymore? Lange Sydney, Australia

Oh Gear Oracle, I have a problem with a build-up of moisture within my mittens, not from rain or snow, but from my own perspiration. This is especially true during snowshoeing trips. I was wondering if there are any shells that have little or no insulation, allowing me to layer them inside and increase the breathability of the mitten. Dennis Portsmouth, New Hampshire

Oh Gear Guide, you have failed us! Over and over I have heard you espouse the quality of the Yashica, so I decided that the T4 was the camera for me. Unfortunately, after hours of searching, I find out that the T4 has not been made for years! Just recently, you suggested the camera but didn't mention that it would be impossible to find. With the T4 no longer on the market, what kind of camera would you suggest? Mike Newark, Ohio

At what point, if ever, should your boots be replaced? Is it a question of mileage, time, or condition? I've had my boots (L.L. Bean Knife Edge, leather) for a number of years. They are well maintained and comfortable. Is there a point where the boot does not perform its support function and the trade off between comfort and support (in favor of comfort) is not worth it? Jim Comerford Wyncote, Pennsylvania

Your Gearness, I'm in desperate need of your expert advice. After two major knee surgeries involving saws, metal plates, and screws, I have suddenly become an advocate of trekking poles. I own a set of Master Kompressor poles with comfortable handles and a useful shock-absorber option. However, I've been tempted by a pair of Leki Ultralites, which are six ounces lighter but without the shock absorbers. At five-foot-one and about 120 pounds, do I really need poles with shock absorbers, or is it a waste of money for me? I have my sights set on the Grand Canyon this spring and would like to have time to "road test" a set of poles before then. Paula San Diego, California

I have been trying to decide between the PUR Guide water filter and the MSR MiniWorks, although I have heard that the MSR clogs less and is cleanable. However, the MiniWorks' high pump per liter ratio has turned me off, especially as the PUR Guide boasts a more efficient output. I will be using the filter mostly in high alpine areas where the water is fairly clear of mud and silt. What are your thoughts? Jim Huntsville, Utah

What are the key factors one should take into account in purchasing a road/touring bike? Brent Ithaca, New York

I want a chest pack to carry my Pentax 67II camera and its lens. It will need to have padded shoulder straps and a strap to hold it tight around my waist. Any ideas? Kiim Clackas, Oregon

I've been looking at water purifiers and have narrowed it down to two-the First Need Deluxe and the Sweet Water Guardian. I've read some on both and I've heard of the Guardian breaking on hiking trips and not being field serviceable. I haven't been able to get much info on the First Need Deluxe, only that is clogs. Which do you think is better and why? Kyle Waco, Texas

Is it better to roll or stuff a tent? Kye Eugene, Oregon

I'm considering purchasing a food dehydrator to help lighten things up on long hikes and bike rides. My research suggests that the best options are the erican Harvest or the Excalibur, but I have no idea of how these compare or if there is a better choice out there. I'm comfortable selecting the price and capacity of the model, but at a loss when it comes to the other nuts and bolts of the subject. Do you have any insights that can inform my decision? Chuck Freeport, Maine

Why are mountaineering leather double boots such as the Boreal G1 or Vasque Vertical such a niche product? They are supposed to provide as much warmth as plastic double boots, without any the discomfort of wearing something fit for Frankenstein. These boots have summited Denali and Everest, yet event the "experts" at specialty gear stores frequently don't know about them. What's the catch? Andy Veres Alexandria, Virginia

What is the absolute cheapest sleeping bag that the Gear Guy would recommend for summer backpacking? Some of us have several thousand dollars to spend on our gear—the rest of us are in college. Doug Chicago, Illinois

What's the best and most reliable lighter to take on a camping trip? The top candidates seem to be Colibri and Windmill lighters. Is there much of a difference? John New York City

I looking for information on free-standing tents before heading into the Everglades, where I'll be sleeping in the chickee huts along the waterway. Can you point me to some particular manufacturers or Web sites? Jeff Naples, Florida

I've been reading your archived responses regarding water-resistant sleeping bag shells with great interest as I'm trying to decide between down bags from several of the companies. After your initial (and maybe continued) ambivalence about Dryloft, I was surprised by your negative view of Epic. Especially since many manufacturers seem to have jumped on the Epic bandwagon as having better breathability. On what basis do you believe that Epic is "a condensation trap" in sleeping bags, and why do you think so many are suddenly using it if indeed it doesn't breathe well? Is it just a fad, too early to tell, or should I stick with Dryloft? I look forward to your reply, if you care to go another round on this topic. No Name Given

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

I just bought new ski boots and I love them. Next on my list is buying new skis. I a solid level-nine skier and can ski anything on the mountain (New England or Rockies), although not always as gracefully as I would like. I love moguls but don't want a ski that submarines in powder. I was looking at the Salomon X-scres but heard that their tails were too stiff and therefore a lot of work in the bumps. Do you have any recommendations for top-of-the-line skis? Will New York, New York

I'm an Australian looking to travel in North America from December to February. Can you recommend a good trekking tent for the season that will house two to three people and their gear? I would like to use the tent year-round and for it to be fairly roomy. Rod Sydney, Australia

What's the best backpack for scrambling? I have taken to canyoneering, usually carrying trekking poles for balance, two ropes, other climbing gear, and occasionally a wetsuit. I'd like to know if there's a slim, lightweight, 3,000- to 3,500-cubic-inch pack that will hold the poles, a water bladder, and my climbing equipment without making it look like I'm tackling Everest. Ray Chicago, Illinois

"I just got through watching reruns of the Eco-Challenge, and was wondering what those competitors (and us less adventurous hikers) can do for very wet, muddy, and slushy hiking conditions? How about Gore-Tex socks and some strips of duct tape around each calf to keep the water out?"

What type of shoes should I wear for day hiking in the Costa Rican rainforest—sandals, trail runners, or water shoes? I will be going in November, historically one of the wettest months of the year. Dion San Francisco, California

Do water bladders sweat inside a daypack? My daypack is big enough to hold a bladder, but I'm worried my other stuff will get soggy if I pack next to a bladder. I worrying for nothing? No Name Given

Dear Gear Guru, Each year I spend more and more time engaging in technically demanding backpacking, backcountry skiing, and mountaineering trips into the remote backcountry. Due to my exposure, the natural dangers of the mountains, and the probability of accidents, the need for a reliable and durable communications system has arisen. Do you know of a system that has long-range communication capabilities and can withstand the needs of being both portable and durable? Is a satellite phone the answer? As always, I look forward to the wisdom of your responses. Sean Constine

I would like to buy a digital camera to bring on climbing, canoeing, and hiking trips. I had been planning to buy an SLR, but I've recently been tempted by digital cameras and their ability to make you impulsively take snapshots. What factors other then weight and picture quality should I consider? Any help you can give me would be much appreciated. Eric Winnipeg, Manitoba

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

You've helped me choose backpacking and mountaineering gear in the past and I'm counting on you again. I'm set to shop for a kayak this spring, and want some advice. My plans call for mostly day trips with some two- to three-night trips on mostly flat rivers, never more than class II/class II+ whitewater. I want a comfortable boat that tracks well, is maneuverable for those class II stretches, and that can hold me (six feet, 210 pounds) and my gear for those three-day trips. I'm thinking a boat in the 12-foot range. I'm hooked on Wilderness Systems Phase 3 seating, but open to suggestions Mike Baltimore, Maryland

Does anyone make a waterproof tight for inclement weather running/cycling? InSport used to make one, but I guess it went the way of Activent. A European company supposedly makes something called the RaidLight tight, but I can't seem to find anyone who carries it. Erin Skowran Belleville, Illinois

What do you think of OR's Pulsar Parka? I see the Outside Buyer's Guide gave it a "Drool" award. I ask because I can't find it for sale at any of the "big" outdoor retailers. I have hunted every major Web site that carries OR products and not one of them carries or even advertises this jacket. Was there some problem with them or why does no one carry them? Thank you for your response. Craig K. Noble Bliss, New York

What have you heard about the new Eureka Zeus Exo1 single wall Tent? I a big Sierra Design Meteor Light CD fan but need a very lightweight tent for a solo through-hike this summer. Thanks for your help! Lora Cochran Cody, Wyoming

Can you shed some light on headlps for a well-intentioned fanny-pack kisser? I'm after a good, bright headlp for hiking and backpacking. I have an old Princeton Tec Solo, but thinking of upgrading to a Black Diond Gemini or one of the Petzl models. And there I was thinking that the days of headgear obsessions ended with high school. Jay Eugene, Oregon

I'm planning a trip to the Bahas this summer and in the market for a reliable diving watch. Can you recommend something that won't implode after the first ten meters and won't shatter my bank balance? Alison Austin, Texas

My husband and I frequently take our two dogs on our camping trips, in all sorts of weather. However, as much as I love them, after a day of hiking on muddy trails I'm often less than enthused about welcoming two balls of mud into our tent (one 20-pound beagle-ball, the other a 60-pound lab-type-ball). We have daydreamed about a lightweight pouch or lightly insulated sleep sack for our dogs. I ready to start experimenting with my sewing machine, but a friend told me there's a company that makes this stuff. Is this true? And if so, is this gear practical? Toni Schenectady, New York

I'll be going to England, Ireland, and Scotland soon and will spend most nights in my tent or in hostels. My question for you is: what kind of pants should I bring? I want them to look good (since I'll be touring museums and all that), but still be lightweight and durable, since I'll be using these on backpacking trips in the future. I think I've narrowed it down to two choices: Ex Officio Explorer Pants and Royal Robbins's Go Everywhere Pants, but I can be persuaded to change my mind. My girlfriend (who goes with me on many of my trips) thinks zip-off pants look completely dorky, so I'm not interested in those. Thanks for any information! Steve Bockhold Memphis, Tennessee

Are there any leather boots that will hold up on the "big peaks" like Denali or Everest? I planning a trip to Denali and would really like to go with leather boots as I've never liked plastics. Any thoughts? Jeff Norfolk, Virginia

What are the best boots for snowshoeing? I've tried winter boots and cross-country ski boots, but none of these fit well enough in my snowshoes. Jean San Francisco, California

I going kayaking in two week's time to Big Bend. As I've never done it before, I'd like to know what gear is needed so that I don't freeze in the water. Luis San Antonio, Texas

Would you recommend a waterproof poncho for backpacking? My friends and I are thinking of doing the West Coast Trail on Vancouver Island this summer. I have heard that even the best Gore-Tex fails under the onslaught of seven days of heavy rain. Previous trail users have suggested carrying a waterproof poncho to cover you and your pack. What are your thoughts on this idea? Chris Barnes Silverdale, Washington

I just recently got into mountaineering and assing all the gear needed to pursue my different interests. I have a lot of the basics and now its time to get some boots. I need a four-season boot for both general mountain travel and technical ice. In the grand scheme of accruing mountain gear, boots account for a pretty hefty chunk of change—especially if you buy three pair of boots: one for three-season mountain travel, another for winter mountain travel, and the third for technical ice. Much more appealing would be a single pair of boots that could do all three. Does such a boot exist? If not, can I get away with two pairs of boots? I'm just looking for a way to escape throwing down $1000 on boots. Josh Hattan Lincoln, Nebraska

I looking for a winter jacket that some may call extreme. I bought a down jacket a few years back that was supposed to be good for -40 degrees Fahrenheit but whenever it is around below zero and a little windy I feel like I have a light fall jacket on. My dre coat would be a down jacket rated to -70 (then I might be warm when it is -10). To top it off I would also like it if it had a fleece liner for extra warmth that I could take in or out depending on the weather. Is there a place that either makes such a jacket or could custom make one? So, I too extreme? Glenn Mulno Needh, Massachussets

I need a bike for commuting that I can use with panniers. Should I go with a traditional touring bike, or should I use one of the hybrids similar to a Trek 7700 FX? I'd like to spend less than $1,250 if possible. I have found some bike commuting pages, but they don't give much guidance on, of all things, bikes. I'm sure you have more than enough time in the saddle to offer some guidance as well as some personal preferences. Tim San Jose, California

I was out hiking in the west Texas desert a few months ago during a delicious spate of rainy summer weather. I was wearing a light pair of boots and found myself slipping and sliding all over the wet rocks. Crawling on my hands and knees over boulders is not my idea of fun, and it really ruined my week. I'm now in the market for a pair of light "day hikers," with soles that'll give me some traction on wet rock. Any suggestions? Paul San Antonio, Texas

I'm looking for the perfect sea-kayaking tent. Currently I'm using an older The North Face Geodesic three-person tent: it's great but is on the large size and tends to leak when not staked out. So, I'm looking for something that packs into a small size, can hold more than one person's gear, sets up easily, doesn't require much staking (sand doesn't hold stakes very well), and is very waterproof. Marshall Watkinsville, Georgia

I recently started taking my dog with me while backpacking, and he loves it. But, should I worry about him drinking from lakes or stres? Should I filter his water for him? Kevin Mississauga, Ontario

I have been looking at jackets and vests from GoLite, and they all seem pretty cool. Logic tells me that their stuff probably doesn't keep one as warm as the heavier stuff other companies offer. Can you confirm that? Matthew Sattah Chattanooga, Tennessee

Do you know of any fully waterproof/breathable gloves made of two- or three-ply Gore-Tex? I'm looking for a glove that I can use for mountain biking when it is 40 to 50 degrees outside and raining hard. I'm not looking for a full-blown expedition climbing-type glove because I won't be out when it's 0 degrees. I've seen the Seal Skinz waterproof gloves but the outside material will retain water pretty much like a sponge. Steven Fleisig Upper Montclair, New Jersey

I've heard that deet will destroy nylon and nylon-blend materials such as tents and quick-drying garments. Is there an effective insect spray that can be used on these materials? Mike Tpa, Florida

There is a well known canoe camping writer that advocates using a plastic ground cloth on the INSIDE of your tent. He says that not only will you be drier in a downpour, but that it will protect the tent floor just as well as if it is placed underneath the tent. What are your thoughts on this subject? Dave Cbridge, Minnesota

I need a big family tent that's not too expensive but rugged enough to last many camping trips. I've compared Cabela's, Eureka, Coleman, and Wenzel. What is the best tent for the money and durability? Curt Woodward, Oklahoma

Greetings, greetings, greetings. I have a five-year-old down-filled North Face sleeping bag. I think it's called the blue moon. I've used it over 100 nights so far and I haven't washed it yet (I know). Anyway, I wanted to know two things. First, what is the best way to wash it? The inside is starting to get, um, for lack of a better word, crusty. I want to wash it myself as I don't trust dry-cleaners. My second question involves the fill. This bag is rated to 20 degrees, so there isn't too much fill to begin with, but now there are some "empty spots" on the bottom. Is there a way to move the fill around? Jeff Dobozy Lake Tahoe, California

Dear Knowledgable one, I have a Twister 270 HPX backpacking stove that uses a butane canister for fuel. I've used it several times and quite pleased with its cooking ability. However, when I place it on uneven ground, I have to go through a balancing act to keep from dumping out my dinner. Is there is a tripod attachment or some other system that would help keep my canister level during cooking? Richard Kipphut Cheshire, Connecticut

What type of sleeping bag gives better value-for-money, down or synthetic? Norm Cpbell River, British Columbia

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 interested in buying a quality set of boots and skis, primarily for Vermont and New England skiing. Problem is, I wear a two-centimeter orthotic insert in my right shoe that corrects a leg length problem and heavy over-pronation. Can I get this custom built into ski boots? Any other options? Also, what's your opinion on the softer boots like the Atomic Beta Ride 10.50? Are they worth the $600? What is the best ski for varying New England snow conditions (i.e. one day powder, next day ice)? Walt McMann Hden, Connecticut

I would like some advice on a permanent or removable roof rack, mainly for carrying several pairs of skis on my Isuzu Trooper. Isuzu sells a rack for around $350, but I'm sure I can find something better for the se money or even less. John Boise, Idaho

I having a very tough time finding hiking boots that are comfortable; they all seem to hurt somewhere. I did find a pair of comfortable trail runners, and I'm wondering if I'd have any trouble day hiking in Glacier National Park using these instead of hiking boots or shoes? How much of a difference is there? Laura Jefferson City, Missouri

I looking for a boot that can do just about everything, including hiking, backpacking, mountaineering, as well as a little bit of climbing and bouldering. I would also prefer a crampon-compatible boot that can handle the snow and cold. Any suggestions, besides going out and buying five different pairs of boots? Jeff Midland, Michigan

While preparing for a recent overnight backpacking trip in the Adirondacks, I was surprised at the weight of my loaded pack. Despite having modern "lightweight" gear such as a Western Mountaineering down sleeping bag and the Sierra Designs Clip Flashlight CD, my pack probably weighed 50 pounds. The pack itself, an Arc'Teryx Bora 80, is somewhat heavy, but I needed its size to fit all my gear, including a bear food canister. Do you have any advice for reducing the weight of my pack for an overnight trip?

How do you clean and wash boots? I have a pair of Asolo Cerro Torre's, and they are fairly light boots, but after a trip in the Never Summer Wilderness with lots of rain and mud, they feel heavy. The dried mud adds up, I guess. How can I make them light again? Thanks. Josh Wheeler 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

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