HONGAO camping sleeping bag is great for all seasons -rated temperature 41-77℉(5-25℃). The most comfortable temperature for humans is 50-68℉(10-20℃).This is achieved through double-filled technology. Perfect for backpacking, camping and hiking even using at home. Certainly the best sleeping bag for adventures.Besides,our sleeping bag can be packed down into an ultra compact bag in seconds. There’s no need to fold or roll it. Just stuff it into the sturdy carrying bag, pull the straps, and it folds down into a small, light THREE POUND package that will easily fit in any backpack.