Patented Design. NTR – No Tools Required Assembly. Beautifully upholstered with Top Grain Italian leather. Overstuffed seat and back. Waterfall seat design eliminates leg fatigue. Ergonomic back design with lumbar support. Upright locking position. Pneumatic gas lift seat height adjustment. Adjustable tilt-tension control. Large 27” nylon base for greater stability. Hooded double wheel casters. Optional knee-tilt mechanism upgrade available.