This 2-pack waterproof rain cover set is designed to protect your backpack from the elements during outdoor adventures. Each cover features a double-layer construction with a wear-resistant nylon outer layer that guards against scratches and dirt, while the waterproof inner layer provides protection against rain and snow with a water pressure resistance of 2000mpa. The covers are sized to fit backpacks measuring 40-53cm in height, 20-32cm in length, and 15-20cm in width, accommodating 30-40L capacity bags. Safety is enhanced through integrated reflective belts that catch vehicle headlights during nighttime activities. The lightweight design allows each cover to be easily folded into a compact size for convenient storage in your backpack's side pocket. These black rain covers are suitable for various outdoor activities including hiking, camping, traveling, cycling, and mountaineering, while also providing dust protection for your gear.