-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.