100% Polyester Imported This sleeping bag is made of polyester and filled to keep the inside of the sleeping bag warm all the time. The inner fabric is filled with double microfiber, which is very soft. Comfortable, durable and skin-friendly-100% polyester lining is skin-friendly and comfortable. High-quality polyester makes it durable. No matter how hard and rugged the ground is, you will feel comfortable. They are very spacious for any adult or child. It's easy to get in and out and turn around to find a comfortable sleeping position. It is suitable for all seasons-keep warm and safe even at temperatures close to freezing point. The waterproof double-layer technology keeps you warm in humid environments and prevents moisture. The outer fabric is made of waterproof material, easy to clean, and machine washable Multifunctional in various occasions: convenient to carry and easy to store. It is suitable for all outdoor activities such as camping, hiking, backpacking, biking and even survival. It can keep you warm even under extreme conditions. These bags are not only suitable for cold environments, but even for warm weather. Our Sleeping Bag is designed for those who want a portable and comfortable sleeping bag for outdoor camping activities, you will be more easy to enjoy the outdoor activates with them. Each sleeping bag is equipped with a compression bag with a shoulder strap, which makes it very convenient to store and carry. Camping Sleeping Bags Portable Waterproof Sleeping Bag for Adults Kids 4 Seasons Winter, Fall, Spring, Summer Backpacking Hiking Camping Mountaineering Indoor Outdoor Use