Here’s how I dealt with a soaking wet down sleeping bag in Maine during October on my northbound AT thru-hike. Some of you might be able to use this method if you couldn’t get to a town and wanted to dry out wet clothes while on the Trail. Works very well for drying out a soaking wet down sleeping bag.
I was carrying one of those Space brand emergency mylar type sleeping bags (thank God I didn’t send it home from Monson). Weighs about 3 ounces and the weight is the only thing that kept me from sending it home.
When my down sleeping bag got soaked (a snowstorm had come in overnight and put several inches of snow on top of me while I was sleeping in a shelter), I retrieved the mylar sleeping bag from my backpack and, with a couple of Pepsi bottles full of hot water, shoved the whole mylar/Pepsi concoction and myself inside my soaking wet down sleeping bag. What a bone-chililng glopping mess that down sleeping bag was at the time.
Oh, I forgot to mention. There was a blizzard and I was in the 100 mile wilderness so I needed to get my down sleeping bag dried out pretty quickly since it was 24*F and the snow was too deep to leave the shelter to find whatever civilization existed in nearby central Maine.
The vapor barrier of the mylar sleeping bag kept all the moisture from the Pepsi hot water bottles inside the mylar sleeping bag while the heat from the Pepsi hot water bottles escaped and dried out the down sleeping bag from the inside out.
Although my skin was wet inside the mylar sleeping bag, within about 8 hours my sleeping bag was dry enough that I didn’t need to use the mylar sleeping bag to dry it anymore.
Here’s the Space brand sleeping bag I used at the beginning of the three day period when I was caught in the blizzard (link may wrap):
http://www.rei.com/online/store/ProductDisplay?storeId=8000&catalogId=40000008000&productId=244&parent_category_rn=4500522
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