SMUGDESK Drafting Chair Tall Office Chair for Standing Desk Drafting Mesh Table Chair with Adjustable Armrest and Foot RingExtremely Good Air Permeability: Comfortable drafting chair with mesh back, will promote air circulation, allowing you to sit cozily for long hours. Built in lumbar support helps prevent back strain and muscle fatigue. Multi function adjustment: This tall office chair has many adjustable features to ensure you to find a good seat position. Adjustable seat height, foot ring and armrests could be easily up and down during busy working time. Comfortable