SIHOO M57 Ergonomic Office Chair with Adjustable Armrests, Lumbar Support, and Headrest (Black)

About this item

• 【Warranty】Product warranty period is three years. If there is any quality problem, please contact us. After confirming, we will change the accessory for you. We promise to provide you with zero profit product accessories within three years of the warranty period.
• - SIHOO ergonomic chair features an adjustable headrest for easy and comfortable neck tilting.
• - It also includes an adjustable lumbar support bracket for height and depth adjustment.
• - The chair has 3D adjustable armrests for various office applications.
• - It offers 90°-126° backrest adjustment for different work positions.
• - The chair has a 3.15-inch lift switch for easy adjustment.
• - It provides 360° freedom to rotate with 3D handrails.
• 【Material】Our home office desk chair aluminum base is stable and durable, bearing quality is good. Silent casters move freely without noise. Double back frame design, stable and durable.
• 【Design】SIHOO is the crystallization of the common wisdom of many professionals in human body, physiologist, product designer, mechanical engineer，does its best to make every step comfortable and safe for every customer. Every small part has strict safety quality testing. Cushion impact test, handrail fatigue test, chair foot static pressure test, in line with the strict standards of office chair.
• 【Ergonomic design】SIHOO ergonomic office chair is recommended by Ergonomics Application Association. SIHOO's ergonomic design is based on the human body dynamic digital model. The ridge backrest and the human spine are exactly the same. The close fitting helps release the spinal pressure. The flow waterfall arc seating design Thigh support is comfortable, SIHOO will make you more comfortable.