The Olympus Chair is designed to provide all-day ergonomic support. Tested to support up to 400 lbs. Upholstered in breathable black fabric and featuring a 22"W x 21 1/2"D seat with 3" of contoured foam padding, the Olympus has easily adjustable seat height (17" to 21"), back height, and locking back tilt. Sturdy and ergonomically contoured back measures 29"H x 21 1/4"W Heavy duty 5-star chrome-plated base and 3" dual casters provide superior durability and maneuverability. Optional height-adjustable arms available for added comfort.