Wild Land feather sleeping bag Filled with nature white duck feather, good fluffy, against cold and extremely warm Using 20Drip-stop nylon fabric, waterproof and anti-penetration Drawing cord neck collar keeps neck and shoulders warm and prevent heat loss Round collar can be folded as a pillow to sleep more comfortable Opening at the bottom with zipper helps smell out Detachable quilt is made with seven hole cotton, give you more choice in different weather Suitable temperature: -120℃- -10℃