YAHILL Cool Weather Summer School Sleeping Bag Waterproof Lightweight for Sport Adventurer Camping Hiking nylon Imported High quality 320D waterproof nylon filled with 100g/ Silk-like Cotton make the sleeping bag cozy, comfortable, waterproof and wet-proof. This Sleeping Bag is great for summer and warm weather camping. Lightweight zipper design, you can use it as a quilt in air condition. Space-saving, portable, it can be compressed to quite small volume with light weight. Ideal for more than 5 years old children and adults.