Ergonomic Mesh Office Chair

✌【Ergonomic Design - Unique Head And Waist Support】✌ POWERSTONE office chair has a prominent design at the waist, supporting and protecting your waist from soreness due to prolonged sitting. The waist support is adjustable in height by 2.5" to meet the comfort of the backrest of people of different heights. The headrest has a curved design that fits your neck perfectly. The headrest has a 2.5" adjustable height and 60° adjustable angle. The backrest has a maximum inclination of 40°. ✌【Size And Material】✌ The size of the POWERSTONE chair is:27"W*27"D*(45"-49")H, the adjustable height range of the armrest is:25"-29", the thickness of the PU armrest is 1.2", the height of the cushion The adjustable range is: 18.5"-22.5", the adjustable height of the American four-level metal air pressure rod is: 3.9", can bear up to 250 pounds, the size of the seat cushion is 20"W*20"D, the diameter of the black PU wheel It is: 2.2". The backrest and cushion are made of breathable nylon mesh. ✌【Clothing