HATO 4.0 Dual-Back Ergonomic Chair: Redefining Comfort for a Healthy Spine

In the busy scenes of modern work, an outstanding office chair is not only a capable assistant for improving productivity but also a caring companion for spinal health. Yihang office furniture, together with the Ergonomics Research Center of Nanjing Forestry University, has proudly launched the Hatu 4.0 dual-back ergonomic chair. It brings the scientific essence of bridge-pose yoga exercise physiology into the heart of its design: after three years of dedicated development, in-depth analysis of 4,000 sample data points, and the yoga-style rehabilitation philosophy favored by spinal experts, it has been crafted into a model of furniture that unites office comfort with spinal health.

1. Innovative lumbar support with precise adjustment to protect the spine

The Yihang Hatu 4.0 dual-back ergonomic chair introduces a breakthrough 4.0 "3D dynamic dual-back" stepless adjustment system. Holder of several pioneering patents, it delivers fine 10-level, 9-segment, 56mm adjustment that precisely matches different heights and sitting postures. Whether you are leaning forward to think, sitting upright to work, or reclining to relax, it provides customized support for the 4th–5th lumbar curve, effectively relieving pressure on the lower back and preventing a hunched posture — letting your lumbar spine enjoy unprecedented comfort and care. This innovative design not only greatly improves office comfort but also quietly builds a solid line of defense for spinal health, making it an ideal choice for modern professionals.

2. Full-dimension personalized adjustment for different needs

The backrest's initial angle is set at 103°, with a 10° self-weighted recline range that adjusts naturally to your body weight without any extra operation. Together with the chassis' 4-level adjustment and a maximum recline angle of 139°, a comfortable lunchtime nap is easy to achieve. The innovative recline control switch is cleverly placed at the rear edge of the seat cushion, easily within reach no matter the length of your arms, so you can adjust it freely. In addition, a 30° rocking swing design lets every movement follow the spine's dynamics, smooth and natural — whether picking up an object or turning to talk with a colleague, everything comes easily.

3. 3D headrest and nap footrest for the ultimate comfort experience

The 3D headrest, designed jointly with Nanjing Forestry University, is precisely considered in three dimensions — up/down, rotation, and forward/back — fitting the head perfectly, whether you are gazing intently at work or lounging at rest. An optional nap footrest extends up to 500mm with an adjustable angle; its interior is filled with shaped foam that is soft and comfortable, making nap time even more pleasant.

4. Full mesh configuration: breathable, healthy, and an upgraded office experience

The Yihang Hatu 4.0 dual-back ergonomic chair comes with a full mesh configuration made of high-quality mesh fabric, suitable for all four seasons and comfortable to the touch. The 3D arched seat design and forward-arc curve fit the curves of hips and legs perfectly, effectively dispersing pressure and reducing fatigue in the hips and legs.

The Yihang Hatu 4.0 dual-back ergonomic chair is not only a trendsetting office chair but also a steadfast guardian of your spinal health. Guided by technology and centered on health, we are committed to creating a work environment that is both efficient and comfortable for you. Experience the Yihang Hatu 4.0 dual-back ergonomic chair today and open a new era of healthy work!