Sleep Warmer

When there’s noth­ing stand­ing be­tween you and subzero temps but your three-sea­son bag, all is not lost. Use th­ese tricks to push fur­ther into win­ter with­out los­ing any sleep. By Krista Karl­son

Backpacker - - PLAY LIST -

1) In­su­late in­side. Sleep­ing bag lin­ers (silk, syn­thetic, or wool) can add 5 to 25 de­grees of warmth.

2) In­su­late be­low. Use an in­flat­able pad to keep you off the cold ground, and layer foam on top to keep body heat close.

3) Stay dry. Lay raingear over your bag to shield it from frozen con­den­sa­tion. Avoid ex­hal­ing in­side your coc­coon—moist breath will leave it damp.

4) Shake it out. Clumpy in­su­la­tion leaves cold spots. Let your bag fluff out a half hour be­fore bed. Once in, shake your legs to evenly re­dis­tribute down.

5) Eat, eat, eat. Down a cho­co­late bar (and a hot bev­er­age) be­fore snug­gling up; di­gest­ing car­bo­hy­drates and fats raises body tem­per­a­ture 30 min­utes to an hour after con­sump­tion.

6) Main­tain cir­cu­la­tion. Warm body and cold toes? Re­move tight socks or leg­gings to keep the blood flow­ing. In­stead, wear loose cloth­ing or—if you must—go bare.

7) Make a space heater. Fill a non-in­su­lated bot­tle with boil­ing wa­ter, seal tightly, en­case in a sock, and place in the bot­tom of your bag to keep feet warm.

8) Fill in gaps. Min­i­mize the space you need to heat. Bag too long? Stuff the end with ex­tra lay­ers.

9) Ex­er­cise. Do sit-ups to warm up your bag pre-shut-eye. Add more reps when­ever you get chilly.

10) Still cold? In­su­late by pil­ing dry leaves or pine branches un­der your tent.

Add a hat or wear a puffy to trap heat on chilly nights.

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