The heated sleeping bag is a very fresh thing, few people have heard or used this product, but this is indeed a very practical thing. Once you have it, you will no longer be interested in other normal sleeping bags. This sleeping bag has a heating function and a total of three temperature settings, the temperature is set between 35-55 °C / 95-131 °F, very suitable for cold winter use, and since this sleeping bag is made by nylon and down metarial, so it can keep the warmth inside the bag, and the light duck down make the bag weight lighter. It can be carried away effortlessly after being packed into a bag. It is a necessity when you are camping.