The high quality silver reflective material allows the driver to see pedestrians in the dark within 328 feet, which can greatly enhance your safety even at night.The wheelchair storage backpack has a Velcro design, which is more adaptable and more convenient to use. The adjustable clip on/off strap not only makes installation and disassembly easy, but also secures the backpack in place for easy use.The wheelchair bag is made of waterproof fabric and is wear-resistant. The inside of the storage bag has a lining for durability.Nylon material can be machine washed or hand washed for easy cleaning.Bearing capacity about 8kg