The ergonomic design of the Alvin Argentum Mesh-Back Drafting Stool lets you sit comfortably all day. The tightly stretched silver mesh backrest features a contoured design for good lumbar support. Adjust the tilt and height of the backrest independently or together with the seat tilt. The molded foam seat also adjusts in height to suit your needs. The polished aluminum base supports a steel footrest and rolls easily over most surfaces with dual-wheel casters.