Waterproof Protection: The waterproof backpack cover is made of water-resistant and tear-resistant nylon on the outside and has a waterproof coating on the inside with a maximum water pressure of 1800 mPa. It will keep your backpack dry in rain and snow.No Come Off: The backpack rain cover has two adjustable straps on the back that act as a fastener to ensure the backpack cover does not come off.Easy to Store: It folds easily and you can carry it in the side pocket of your backpack so it's always ready to go.Versatile Use: This backpack cover is suitable for backpacks, computer bags, school bags and more. It is a necessity for outdoor travel and daily life; It can also be used as a computer screen cover, seat cushion, bicycle rain mat, and any gear that needs rain protection on rainy days.Full Size Specifications: We have multiple sizes of backpack covers available so you can choose the right size for your needs.