Nylon
【Ultra Comfort & Durable】Outer material: Nylon (Waterproof and Durable), Lining:100% Polyester (Breathable and skin-friendly), Premium Polyester keeps the temperature from 55 to 60℉ and provides a ultra-comfort sleep environment to people.
【Professional Design】The sleeping bag is waterproof and weatherproof. And the smooth zip closure makes it more convenient. Our sleeping bag measures 83″L x 30″W, the size fits for most people. It can accommodate an adult or two children