ERGONOMICS DESIGN & COMFORTABLEOur office chair with ergonomic design gives you maximum support for comfort and convenience. The executive desk chair has back support and headrest for less pressure on the back of your legs so you can stay comfortable even when you have to sit down for hours. Ample foam padded contoured seat with waterfall rounded edge contributes to good blood flow by reducing the pressure at the back of the legs and keeps your back and thighs posture perfect. MULTIFUNCTIONAL ADJUSTABLE OFFICE CHAIRMassage office chair have a vibrator with remote control, slight vibration can reduce the fatigue caused by your long hours of work; Adjustable height, pass the BIFMA and SGS, you can adjust the seat high from 19.5-23.2, back angle from 90°to 155°; 360-degree swivel and comfortable armrest(free your hand). Office chair gaming chair ergonomic executive chair task chair EASY TO ASSEMBLEWith the installation instruction,the computer desk chair can be assembled i