Ergonomically designed lumbar support pillow standard widened seat, breathable material: leather-style slender and taller backrest can save reduction and 3D straight armrests on the spine, protect the wrist and wrist. Ergonomically designed racing chair-more material : Metal frame, easy-to-clean artificial leather, chair swing back and forth, adjustable backrest angle is 90°-165° safety angle; armrest and seat height adjustment; 360-degree rotation; five-point base with heavy-duty and tilt-rolling Casters; game office chair game racing, ergonomic backrest and seat height adjustment, reclining rotary rocker headrest; waist tilt e-sports chair