The SIHOO Ergonomic Office Chair delivers superior comfort with its fully adjustable design, featuring a multi-directional headrest, customizable lumbar support, 3D armrests, and a 90°-126° reclining backrest for versatile working positions, along with 3.15-inch height adjustment and 360° smooth rotation. Endorsed by the Ergonomics Application Association, its scientifically designed ridge backrest mirrors the human spine to relieve pressure, while the waterfall-edge seat cushion provides optimal thigh support. Built with premium materials, including a sturdy aluminum base, noise-free casters, and a dual-frame backrest for enhanced durability, this chair undergoes rigorous testing (including seat impact, armrest fatigue, and leg static pressure tests) to meet strict safety standards. Backed by a 3-year warranty, we offer free replacement parts for any quality issues—contact us for prompt assistance.

The Sihoo M56C Ergonomic Office Chair delivers dynamic 3D adaptive lumbar support that automatically adjusts to your movements, maintaining perfect spinal alignment whether you're working upright or reclined at 125°, while its reinforced widened backrest provides full-length tension relief. Experience premium ergonomic comfort with an oversized 2D adjustable headrest for neck support, a weight-distributing W-shaped seat cushion, and breathable mesh with soft armrests for all-day cool comfort. Built for durability, its dual-tilt mechanism locks in your preferred angle, supported by rigorously tested materials that undergo 100,000+ cycle stress tests on all key components. Backed by a 3-year warranty and 24/7 customer support, we guarantee 30-day easy returns—invest in lasting comfort with the M56C, designed to keep you supported through every workday.

Newtral Magic H003 ergonomic office chair - intelligent waist protection, no need to feel tired when sitting for a long time! Automatically tracks the lumbar curve, provides fitting support, relieves back pain from sitting for a long time, and can adjust the strength as you like. The chair back can be raised and lowered in 3 levels, with 96°-126° recline lock, 3D adjustment of the headrest/seat depth/armrest, and multi-functional adjustment function. BIFMA/SGS certified, highly elastic and breathable mesh + 7cm high-density sponge cushion, durable and safer. Approved by international ergonomic experts and chiropractors, it protects the spine scientifically and says goodbye to injuries caused by bad sitting posture. The decompression and pressure-relieving seat cushion is like sitting on a cloud, and the breathable design allows you to sit for a long time without feeling stuffy, making every moment relaxed and comfortable. Magic H003, designed for healthy office work!