The Rioyalo Premium 0 Degree Winter Sleeping Bags are designed for camping, backpacking, traveling, trekking, hiking in four seasons etc. The sleeping bags are lightweight and highly portable. The top line 100 percent polyester fiber 350GSM aligned with top-notch shell provides extra warm comfort during outdoor activities without adding extra weight to already sore shoulders (only a little over 4lbs). The easy fold-able design along with a compression sack with straps makes it extremely convenient to carry, store and reuse. The sleeping bags are ultra comfortable and designed for COLD weather (temperature range from 5F - 32F degree). The first-rate 190T Pongee lining is skin-friendly. The top quality 210T Nylon ripstop on the shell, 190T Pongee Lining in 100% Polyester, as well as premium 350GSM 100 percent polyester fiber filling provide high quality and super durability and waterproof design that keeps you warm in even extreme weather and prevents you from dampness.