ICEKEY Waterproof Backpack Rainproof Cover Bag Camping Cycling Hiking Rain Resist Proof It is durable, portable and useful. Perfect for outdoor, travel, riding, climbing. Made of waterproof wear-resisting Nylon material. The rain cover for all kinds of backpack, computer bag, student bag outside bag, mountaineering bag, etc.As outdoor travel and daily travel Essentials. With elastic cord to adjust to different size of backpack.