COMFORTABLE MATERIAL: The surface material of the camping sleeping bag is made of waterproof and breathable polyester, and the filling material is hollow cotton, which is very soft. After hiking, backpacking and outdoor adventure activities, it can provide you with a super comfortable sleeping environment..USED FOR 4 SEASONS: Our sleeping bags can keep warm in various outdoor activities in spring, summer, autumn and winter. Rated temperature 5(℃)--25(℃), which allows sleeper warm even at 40(℉), comfort temperature is 17(℃)--24(℃). It also adopts a weatherproof design to keep warm under extreme conditions . This is achieved by double filling technology..EASY TO CARRY AND CLEAN: Each Flantree sleeping bag is equipped with a travel-friendly compression bag. The rolling control design can pack the sleeping bag in a very short period of time, making folding and storage convenient and fast. It can be wiped clean by hand or machine washed..PRACTICAL DESIGN: The double zipper slider allows you to open the bottom of the sleeping bag in warm nights and make your feet move with the wind. You can even open the sleeping bag completely and use it as a blanket. The sleeping bag ensures the circulation of air, allowing you to enjoy a comfortable sleep..SERVICE: We are confident in the quality of our products, if you have any quality problems after purchasing the products, please feel free to contact us, we will provide you with refund and return support.