The Cole-Parmer ergonomic chair features breathable mesh back, adjustable arm rests, adjustable lumbar support, and comfort molded seating to provide maximum comfort and support for extended periods of sitting. Pneumatic cylinder lets you adjust chair height from 19 to 23 inches from the top of the seat to the floor. The seat is constructed of highly durable polyurethane foam cushioning covered with antibacterial/antifungal stain-resistant Supernova™ vinyl, giving it a high-end look and feel. The nylon-reinforced fiberglass composite base features five legs with dual-wheel casters suitable for carpeted floors.