Office Star Work Smart Collection Bonded Burgundy Leather Adjustable Ergonomic Chair with Black Base High-back chair features thick eco-leather cushions with lumbar support and arms that adjust in height and width. Eco-leather offers a soft feel and recycled leather. Seat and back have individual controls with infinite locking. Functions include one-touch pneumatic seat-height adjustment, 360-degree swivel, tilt, tilt tension, tilt lock and multitask control. Seat measures 20-1/4" wide x 19-1/2" deep x 5" thick. Back dimensions are 20-1/2" wide x 5" thick x 26-1/4" high