Sierra Designs Echo 0 Degree Sleeping Bag:
Slide on in for the warmest night under the stars (and snow and wind and then some). Eight-hundred-series premium goose down gives the Echo its Arctic-ready warmth and Drizone waterproof-breathable shell fabric protects you from the elements. After a few days in the mountains your expedition mates will appreciate the Echo's Funk!Off liner-simply turn the bag inside-out, leave it to sit in the sun and voila, dirt and oils magically break down for a cleaner, fresher bag. Warm and never funky, the perfect winter-time companion.