Mesh Chair, upholstered with mesh material, which allows air to pass through, adding to long term comfort by preventing body heat and moisture to build-up. Mesh back provides the perfect level of support by conforming to each individuals back shape. Breathable mesh fabric seat with ample padding. Pneumatic gas lift height adjustment. Adjustable tilt tension control. 25″ nylon base. Hooded double wheel casters. Adjustable height arms. Adjustable tilt tension control. Arm Height: 26.5″-33″H; Upholstered with mesh material, which allows air to pass through, adding to long term comfort by preventing body heat and moisture to build-up. Mesh back provides the perfect level of support by conforming to each individuals back shape. Breathable mesh fabric seat with ample padding. Pneumatic gas lift height adjustment. Adjustable tilt tension control. 25″ nylon base. Hooded double wheel casters. Adjustable height arms. Adjustable tilt tension control. Arm Height: 26.5″-33″H Seat Size: 19.5″W x 18.5″D. Seat Height: 18″-21.5″H. Overall size: 26.5″W x 25″D x 38.5-42″H.