The STRONGBACK Mobility Wheelchair Backpack features four adjustable straps which secure the wheelchair bag to the wheelchair back, making it more stable and suitable for 16", 18", and 20" STRONGBACK wheelchair model seat sizes, including transport chairs. Additional removable shoulder strap included. The main compartment is top zipper accessible along with an additional front large zipper pocket for a small ice pack and medicine storage, two front velcro pockets, and two side mesh pockets to keep your aid transfer sling, wheelchair poncho, and other daily necessities separate. A back zipper pocket exists for keeping wallets and keys secure. It can also be used to store catheter bags, keeping them hidden and safe. All zippers feature a large finger loop for easy opening and closing, and the top has a flap over the zipper to prevent rain from easily getting in. Wheelchair bag to hang on the back of the chair is a great help to free your hands when you transport elders, the disabled, and patients in and out of buildings in a STRONGBACK wheelchair. The elastic strip on the back can be used to place it securely on top of roller suitcases. The backpack wheelchair accessories for adults is designed with extra safety reflective strips, visible up to 100 meters at night.