The seat belt can be fixed with Velcro at the back of the wheelchair package and adjust to the desired length. Make sure the wider, foamed part is at the front of your abdomen. When the seatbelt is not in use, you can unclip the buckle and store it at the top of the wheelchair package. You can convert the Rollz Motion into a walker while the belt is attached to the wheelchair package. Works with all the Rollz Motion models.