[Ergonomic Design: KERDOM office chair features a thoughtful ergonomic design with 4 support points (head back hips and hands). It conforms to the natural curves of the human body and provides good support for your spine perfect for long hours of work Customizable Comfort: KERDOM desk chair offers adjustable lumbar support to find a ideal position for your lower back. You can customize the seat height to your liking and enjoy padded armrests that can be folded up or down to save space under your desk "Breathable & Comfortable: Mesh backrest and cushion are refreshing and breathable so you wont feel stuffy even in hot weather. The thickened sponge cushion will not collapse easily giving you a more comfortable sitting experience" Built to Last: KERDOM ergonomic chair has passed the quality test maximum capacity 250 lbs. Thickened explosion-proof steel chassis is durable. Every detail is thoughtfully designed making it an excellent choice for your home office Worry-free Aftersales: Easy to assemble provide you with a detailed installation manual or video use the included tools and expect to finish the assembly in 15-20 minutes. KERDOM provides 5 year of free support and our customer service team is ready to assist you]