1.Waterproof Technology: Made of high-quality Waterproof polyester Material, external waterproof coating, Ideal for the rainy activities. 2.ALL-OVER PROTECTION: The Elastic and Cross Adjustable Buckle Straps provided extra stability and the more coverage, make sure your backpack get fully covered, protect your backpack even in heavy wind. 3.Ease to use: Each backpack cover comes with a RAINPROOF STORAGE POUCH that you can just clip it to your backpack, you will not be unprepared for the sudden rain shower. 4.MULTI-FUNCTION &WIDELY APPLICATION: Due to the foldable function of this waterproof backpack cover, it can be used as bicycle rain cushion, electric fan cover and the equipment that needs to be rainproof in rainy days. Perfectly suitable for hiking, camping, cycling, fishing and other outdoor activities. 5.Easy Storage : It can be easily folded so that you can put it in the side bag of your backpack to save space.