This thick padded seat with built-in lumbar support reduces stress to legs. The Pneumatic seat height adjustment allows for customized comfort. The base allows or easy movement while providing stability. The chair comes with hooded double wheel casters. Contoured task chair with lumbar support Waterfall-contour seat that relieves stress to legs Padded seat covered in durable fabric Seat height adjustment for heights from 18.5 to 23.5 inches Nicer Interior Deluxe Computer Chair - Adjustable Arms - Black