Ergonomic Design with Soft & Comfort Seat: Desk chair using high-density sponge cushion , PU leather with rhinestones as a decoration, more flexible, office chair with a high back design, it can provide good lumbar support makes you feel comfortable. Adjustable Height: This gas lift office chair is built with a gas lift cylinder to ensure your safety at every height. The seat height can be adjusted from 14.3"-18". With Armrest: It is a good choice to add one of our computer chair in your office or put a desk chair in your home/activity room. The seat measures 18.8"(W)*16.8"(D).