Jepeak Waterproof Backpack Rain Cover, 25L-45L Daypack Rainproof Dustproof Protector Raincover (Elastic Adjustable) for Hiking Camping Traveling Climbing Cycling RAINPROOF PROTECTION: The backpack rain cover with PU coating on the surface offers a reliable protection of up to 3000 mm of rain resistance, even in downpours can also protect your backpack. CAPACITY: 25L-45L are available, elastic material around the edge of the cover, it is able to adjust the size according to different backpacks. DURABLE AND LIGHTWEIGHT: Made of waterproof wear-resisting Nylon material, durable, very light almost weightless, portable, useful and scratch-resistant. EASY TO APPLY, EASY TO STORE: The rain cover for backpack fold into a carrying back simply, takes up very little room and weighs practically nothing, you can just throw this in the side pocket of the bag and use it whenever. MULTIPURPOSE USE: Perfect for school bag, backpack, daypack, knapsack, overnight bag for outdoor travel, riding, climbing, hiking, cycling, commuting and so on. S: 18.5 x 12.5 x 8 inches for 25-35L backpack. M: 21.5 x 13.8 x 10 inches for 35-45L backpack. 1 x Backpack Rain Cover. 1 x Raincover Storage Bag This rain cover is made from lightweight nylon fabric that offers superior durability. With PU coating for better water resist (&gt;3000mm) protect your electronic gadgets, books, and other stuff that can be damaged by water, even in downpours can also protect your backpack. The quality waterproof material will give you years of use for different outdoor activities, such as camping, mountaineering, desert hiking, cycling, fishing and more. Made of a full piece of 300D nylon fabric. With PU ultrathin coating, features 3000mm waterproof. Elastic material around the edge of the cover, it is able to adjust the size according to different backpacks. The rain cover for backpack fold into a carrying back simply, takes up very little room and weighs practically nothing, you can just throw this in the side pocket of the bag and use it whenever.