Polyester fabric upholstery with mesh back for durability, breathable mesh back and durable armrests for added comfort, Buy Studio Designs Riviera Drafting Chair. The Riviera drafting chair offers a contoured, Pneumatic seat height adjustment: 25" - 33. Adjustable seat and backrest, The chrome foot ring allows the user to sit comfortably with the added height needed for use with a studio designs' drafting table, Crafts & Sewing, Black: Drafting Chairs - ✓ FREE DELIVERY possible on eligible purchases. Studio Designs Riviera Drafting Chair, Black: Arts, Adjustable height chrome foot ring. Five star nylon base with casters for mobility, 5" H.