This rehab shower commode chair features a Multi-Position Back with center-of-gravity adjustment and comes standard with 4″ of height adjustment, an adjustable-tension fabric backrest, 5″ dual-locking casters (for 400-lb. weight capacity) or 6″ dual-locking casters (for 600-lb. weight capacity). The Ischial & Pelvic Alignment System provides 2″ of seat depth adjustment to accommodate different body shapes and sizes, and to optimize comfort.