The external material of the sleeping bag must have a certain degree of waterproofness. Once it is wet and not easy to dry, it will lose its thermal insulation performance, so it is necessary to use waterproof and breathable materials as its external fabric.

Generally speaking, the down content of professional sleeping bags should be above 80%, and the down content of ordinary down sleeping bags should not be lower than 70%, otherwise it will not meet the requirements in terms of compressibility, weight and warmth.

Do not use alkaline detergents, twist, or bake and dry down sleeping bags. The down sleeping bag can be shared with the cotton sleeping bag lining (sleeping bag cover) to reduce the chance of washing, and the cotton sleeping bag lining can help absorb sweat.

The sleeping bag is suitable for laying flat to dry in a ventilated and dry environment. Avoid strong direct sunlight. Ultraviolet rays will damage the nylon surface. After drying, pat lightly. After the sleeping bag is restored to its original state, put it into the storage bag.