Take advantage of the latest advancements in ergonomic office seating design with our Advanced Ergonomic Black Mesh Back Ultra Office Chair. Designed not only with an attractive and innovative new style, but also with the latest in comfort features. Makes an excellent choice for a wide array of office uses - from all day office use to a high-tech conference or training room. The Ultra's superior comfort features include a fully breathable, durable mesh backrest. You will definitely appreciate the contoured backrest design and fore/aft padded adjustable lumbar support. Ultra's seat is a soft padded mesh over a firmer density contoured foam cushion. Soft, contoured cushion arm pads are both width adjustable and height adjustable in 5 positions. The Advanced Ergonomic Ultra adds a knee-tilt function that moves the tilt pivot point to behind the knees - keeping your feet firmly on the floor when reclining. This advanced knee-tilt function also has a multi-position lock to find your ideal position - or, leave it in free-float. Also includes a tilt tension adjustment and gas lift height adjustment. A polished chrome base is both durable and adds an attractive accent. The Ultra series of chairs is one of our best recommendations for comfortable ergonomic seating at an exceptional value price. The Ultra with the advanced mechanism sold here is considered to be well worth the upgrade for all day users. This chair is tested for users up to 250 lbs. and is recommended for the mid sized user for lengthy applications. Excellent functions to accommodate most users due to its adjustable lumbar functions and height and width adjustable armrests. Recommended for all day use up to 8 hours. Dual wheel carpet casters. See soft casters for hard floors below. Measures 25"-27"W x 23"D x 37-1/2"-41-1/2"H overall. Seat measures 20-1/2"W x 20"D. Backrest is 19-3/4"W x 21-1/2"H. Width between arm posts is 20-1/2"-22-1/2"W. Ships unassembled. Shipping weight 45 lbs. All components exceed ANSI/BIFMA commercial use requirements. Meets CA fire foam approval. 5-Year Limited Warranty. PRICE INCLUDES SHIPPING! IN STOCK!