Almost invisible! Flexible and easy to use, this design has no bulky hardware and is hardly noticeable. This chest support is designed to be comfortable and extremely durable. It offers positioning for individuals that benefit from having their upper body stabilized and hips held at a proper angle. It can be used with most standard, high back, or custom wheelchairs and strollers. Sizes: (measure seated, shoulder to hip) Infant: 6"-8" X-small: 8"-10" Small: 10"-14" Medium: 14"-17" Large: 17"-20". Please see frequently asked questions, #19, for strapping options. If no option is chosen, standard strapping will be sent. Please Note: This product is not a restraint.