Product size: S: 35 liters M: 55-60 liters L: 70 liters Material: inner coated silver water pressure 1500, cloth surface water repellent, 190T polyester taffeta Package Contents: 1pc Backpack Waterproof Cover 1. High-quality material backpack cover is made of waterproof 190T nylon fabric, which is breathable, lightweight, wear-resistant and scratch-resistant. 2. Elastic design The elastic band on the edge of the cover allows it to be securely fastened to the backpack 3. Rain Protection Thanks to the double waterproof coating technology, the backpack rain cover with PU coating on the surface can provide up to 2000mm rain protection, which means your backpack and your belongings can be effectively kept dry protected from rain. 4. Wide range of applications The backpack cover is waterproof, dustproof and scratch-resistant, ideal for cycling, mountaineering, camping and hiking. 5. Easy to fold It can be freely folded into the pocket, easy to carry and super light weight. You can take it off, clean and dry it for reuse