-QEZER down sleeping bags for Adult are filled with 660 FP 1000g duck down . Pure natural and healthy material . fluffy and soft . no odor or impurities. -Comfort temperature: 17??F-32??F . Extreme Temperature: 5 ??F . best choice for cold weather-Use size: 86.6″ x 31.5″ . Storage size: 16.5″ x 7.5″ (dedicated compression storage bag) . Weight: 3.5lbs. It’s about half the weight and volume of a polyester sleeping bag . super compact and easy to carry.-The outer and inner layers of the lightweight sleeping bag are made of 400T 40D tear-resistant nylon fabric . ultra-high-density fabric with excellent waterproof and windproof performance.