You won't believe how much warmth and comfort you get from such a small package - the Nitro packs into a tiny sack (included) but stays toasty to 15 degrees. We build in Flex™ between the shoulders and knees so you get the comfort and thermal benefits while saving precious ounces. Continuous baffling and a draft tube contain 800-fill goose down the warmest lightest insulation available.

Buy the Sierra Designs Nitro 15 Degree Sleeping Bag at Altrec.com. Orders over $45 qualify for free shipping.