The 24-Hour High Performance Chair supports up to 300 lbs. The seat cushion features memory foam. The multi-function chair control allows the seat and back angle to be independently adjusted. The chair seat tilts both forward and rearward with a tilt tension adjustment. The optional T-shaped arms are height adjustable and have comfortable impact resistant urethane arm rests. The sculpted back has pronounced lumbar support for maximum lower back comfort. The back is height adjustable for precise positioning of the lumbar area. The Seat Height is 19" at its lowest and 22" at its highest. Features: Supports up to 300 lbs Seat cushion features memory foam Multi-function chair control allows the seat and back angle to be independently adjusted Chair seat tilts both forward and rearward with tilt tension adjustment Optional T-shaped arms are height adjustable and have comfortable impact resistant urethane arm rests (sold separately) Sculpted back has pronounced lumbar support for maximum lower back comfort Back is height adjustable for precise positioning of the lumbar area Specifictions: Overall product dimensions: 42" - 45" H x 21" W x 29" D Product weight: 48.02 lbs.