SIHOO Doro-C300 Ergonomic Office Chair-4 Positions Adjustable Backrest, 3 Positions Adjustment Recline, 3D Armrests, Computer Chair with...

Auto-Adaptive Lumbar Support: Ergonomic lumbar support for constant back comfort. 4-Position Adjustable Backrest: Flexible seatback that matches and relaxes your back. Waterfall-Shaped Seat: Waterfall-shaped seat to offer a weightless seating experience. 3-Position Adjustable Recline: Smart weight-sensing chassis for effortless and balanced reclining. Swivel Lift Headrest: Wide multi-adjustable headrest for high-precision neck support. 3D Armrests: 3D coordinated armrests to relax your arms in all positions, ultra-soft armrest surface to bring extraordinary handicap experience.