High Quality: The outer layer of the waterproof backpack cover is made of waterproof nylon, which is tear-resistant and wear-resistant, preventing scratches and dirt. And with reflective strips, it can be used as a signal in bad weather or dangerous situations. Elastic band design: The reflective backpack rain cover has a high elastic band to hold it firmly on your back and prevent it from falling off. The size of the rain cover can be adjusted according to different backpacks to prevent rain. Package: You will receive 2 backpack covers. It comes with 2 different colored backpack cases (yellow and black). Perfect protection for your backpack and school bag when going to school on rainy days. Easy to use: The dust bag is lightweight and quick to put on and take off. It can be easily folded and put in the side pocket of the backpack to save space. It fits perfectly in carry-on, satchel. Wide Application: The backpack rain cover is waterproof and scratch resistant, perfect for cycling, climbing, camping and hiking. In addition, it can also be used as a seat cushion and other equipment that needs to be protected from rain or water. Size: height: 52-60 cm, width 32-37 cm, thickness 18-22 cm, suitable for 40-50 liters.