Good waterproofness: Nylon fabric; double layer PU coating; good rain resistance, protect the backpack from moisture High quality: sewing thread caulking. Threadless sewing to prevent wear, lightweight and compact products; foldable, easy to carry Suitable for different types of backpacks: 48*60cm30L-45L, suitable for most kinds of bags or backpacks. Reflective tape: waterproof and rainproof to provide reflective tape, it is a color of warning. When light hits the beam, the color reflections increase visibility of darkness or flow and road safety. Convenient: Just put it on your bag to keep it dry and help you through rainy weather during outdoor activities such as camping, hiking, biking and more. Protect your heavy luggage from wet contents in the rain.