4 Colors to Choose: the backpack water cover comes in 4 colors, namely black, blue, orange and camouflage green, vibrant and stylish, sufficient to share with your friends, to enjoy the fun of sports together. Practical and Versatile: the rain proof backpack cover can be widely applied for hiking, camping, fishing, cycling, kayaking, backpacking, traveling, hunting, climbing, jogging and other outdoor activities, making you always ready for sudden rain. Anti Slip Design: featuring 2 adjustable anti slip cross buckle straps and elastic rim, the rain cover for backpack can securely attach your backpack, without sliding or pushed off by shoulder straps, and will not be blown away even in heavy winds. Strong and Waterproof: the travel backpack rain cover is made of quality nylon material, tear resistant and reliable, with external waterproof coating and inner PU coating, can nicely keep your bag from scratch, dirt, sand, rain, water, frost, wind, snow and so on. Abundant to Use and Replace: the package includes 4 pieces of waterproof covers for backpacks, suitable for backpacks 45-55 L, and comes with 4 pieces of waterproof storage pouches, which can be easily clipped to your backpack.