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Backpacker Magazine – BACKPACKER.com Online Exclusive

Layering For Winter

How to dress smart and stay warm when Old Man Winter blows in.

by: Steve Howe


Winter clothing keeps you warm primarily by trapping warm air next to your body (insulation). But when being active in winter and spending multiple days in the same clothes, insulation alone is not enough. It has to stay dry, not just from the outside in, but from the inside out. This is where specialized outdoor clothing is literally a lifesaver. Wearing cotton or other moisture-retaining fabrics puts you at risk for serious heat loss.

Any moisture that remains in your clothing quickly conducts body heat straight to the atmosphere. This means your active clothing (as opposed to the super-warm down jacket that you only wear in camp) must not retain perspiration; instead it must quickly transfer body moisture to your outermost layer, where it can evaporate. The key is to wear layers made of synthetic, quick-drying material that helps evaporate your sweat. That way, your clothes aren't wet enough to transfer a significant amount of heat away from your body.

The advantage to layering, of course, is that when working hard and starting to overheat, you can simply take off an insulating layer (usually a fleece jacket or vest), replace your windproof shell, and you're on your way. When inactive and cooling down, you can replace the insulating layer.

From bottom to top, here are the layers you should include in any cold-weather travel:

Underlayer:

  • Two pairs liner socks (thin, quick-drying)
  • liner gloves
  • Synthetic underpants
  • Synthetic long underwear tops and bottoms

Insulating layer 1:

  • Thick insulating socks (one pair per day)
  • Synthetic pants
  • Synthetic shirt

Insulating layer 2:

  • heavy gloves or mittens (mittens conserve heat better); plus extra pair in case one is lost
  • Fleece pants
  • Fleece vest

Outer layer:


  • Down jacket, preferably with waterproof/breathable outer material
  • Shell pants, waterproof/breathable
  • Shell jacket with hood, waterproof/breathable
  • neck gaiter or scarf
  • shell mittens of waterproof/breathable material
  • hat (fleece or wool)
  • brimmed cap for warm, sunny days
  • boots, waterproof and roomy enough for thick socks and toe-wiggling to prevent frostbite
  • gaiters
  • goggles (for wind and snow)
  • sunglasses, sunscreen and lip balm with sunblock

Fleece offers more warmth for the weight than wool, but some still prefer good old wool. Goose-down is the warmest for the weight, and should be included for rest stops and while hanging around camp, so that you can maintain a constant body temperature between exercising and resting. It also compresses easily for stuffing into a pack. But don't break a sweat while wearing it; it dries poorly and won't keep you warm when it's wet the way fleece or other synthetics do.

With today's synthetic clothing, socks are the only thing you need to change in the backcountry (dry feet are absolutely essential to preventing frostbite). Bring a pair of insulating socks for each day, ideally with a plastic bag for storing each separately.


Story adapted from BACKPACKER's Making Camp, by Steve Howe et al., (The Mountaineers, 800-553-4453, www.backpacker.com/bookstore, $16.95).



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READERS COMMENTS

Joey Jo Jo
Jan 04, 2010

P.S.
I've hiked up Everest twelve times with this setup. No tent. No sleeping bag.

Joey Jo Jo
Jan 04, 2010

You're supposed to wear 5 pairs of pants, extra long, so that you don't need socks. If by chance your feet are cold... Slip some fleece socks over your boots. These work well over mittens too.

Sure-Foot
Dec 17, 2009

Am I really expected to put all of this stuff on? I like what you have to say, but I am left wondering about the sheer bulk of this outfit. Also, are you saying that I should wear two pairs of liner socks at the same time? It kind of reads that way. And, how many pairs of pants am I wearing? I see long underwear, fleece pants, and then an outer layer on top of that. This just seems like a lot. I realize, though, that it is probably ideal in Alaska or similar areas, but what about just the dead of winter on the northern sections of the A.T.?

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