【SEGMENTED ERGONOMIC DESKIGN 】Different from other monotonous square chair, our executive office chair adopts three-dimensional layered sponge cushion, according to human head, shoulder, back, buttock and legs, to achieve the five-point support effect, in line with the human spine trend, to achieve millimeter-level intimate support and maintain the natural curve of spine and reduce discomfort. 【DYNAMIC MULTI-FUNCTIONAL ADJUSTMENT】The desk chair has 360° free and smooth rotation, 3.2''in seat height adjustment, 135° tilt angle of back, adjustable lumbar support pillow, retractable leather footrest and height adjustable leather armrest. Customize your sitting posture, so that you can easily switch office and nap mode, make your work space more comfortable and relaxed, relieve your fatigue. 【HIGH DENSITY & RESILIENCE SPONGE】Our ergonomic chair has memory sponge material, adapt to the body curve according to the pressure of human, providing personalized support for different sizes or weights; High density make the cushion have high elasticity and durability, not easy to collapse. The characteristics of good air permeability and moisture emission keep the seat dry and clean. 【CERTIFIED HIGH QUALITY MATERIAL】Our computer chairs' exterior is made of expensive and environmental soft PU leather; The interior adopts thick and non-deformable high resilience sponge; Every part of chair has been carefully selected, smooth and silent wheels; SGS certified Class 3 gas cylinder; sturdy metal base, tested more than 100,000 times, with BIFIMA certification.