ArcEnCiel Waterproof Backpack Rain Cover Rainproof for Hiking Camping Traveling Cycling Outdoor Activities Extreme durability : made from rip-resistant polyester oxford fabric Lightweight and easily stowable ; Can be free folded in the sachet Keep your backpack and belongings dry from rain With elastic design , it is able to adjust the size according to different backpacks Perfect for outdoor , traveling , riding , climbing , etc.