The Sierra Designs Backcountry Bed 20 Degree Sleeping Bag is a sleeping bag that's more like home for the backcountry. Snuggle in and forget the closed-in spaces of a traditional mummy bag. It may be insulated with 650 fill power DriDown like many other bags, but with the Oversized comforter, hand/arm pockets, the similarities Are few. Drafts stay out, you can tuck in just like you're at home and sleep soundly through the night. Features of the Sierra Designs Backcountry Bed 20 Degree Sleeping Bag Patent pending zipperless design provides an ultra-comfortable lightweight bag 650 Fill power DriDown for lightweight warmth Oversized integrated comforter gives all the comforts of your bed at home Full-length, insulated hand/arm pockets help to seal out drafts and seal in warmth Patented self-sealing foot vent provides fast and easy ventilation Stretch cord closure system helps to seal out drafts Sleeping pad sleeve keeps pad under you for comfort and warmth, and replaces unnecessary bottom Insulation