Come and see our amazing products. Made of high-quality tear resistant nylon material,external waterproof coating,inner layer cover with PU coating offers reliable protection of up to 5000 mm of rain resistance, Ideal for any rainy activities,100% Money back guarantee if you are not satisfied.The elastic and cross adjustable buckle straps provided extra stability and 50% more coverage, make sure your backpack get fully covered, protect your backpack even in heavy wind. Suitable for Backpack 15-90L, Please check the size chart in the 6th picture or description.Each backpack cover comes with a rainproof storage pouch that you can just clip it to your backpack,you will never be unprepared for the sudden rain shower. Pls confirm further with us if any query about packing info, inventory status and time schedule.