Comfortable Seat: High density foam filled seat. Thickened seat cushions, giving you a more comfortable and immersive sitting experience, allowing you to focus more on work and study. ERGONOMIC DESIGN with 360° Rotation & Adjustable Height: European quality and a stable star base give you the freedom to move gracefully and effectively on 360 degree swivel casters. Great for your office, salon, home, hospital and laboratory. EASY ASSEMBLY in 2 STEPS: No tools required! The chair comes with everything you need and is so easy to assemble, you won't even need step by step instructions (but we include them for you anyways!)