JONPONY 500 lbs big and tall office chair with W-Shape Thicken Cushion, ergonomic office chairs with Flip-up Armrests, Breathable Mesh Extended Desk chairs for adults, computer chair Black

【Thicker Seat for More Comfort】 The tall office chair for standing desk features a breathable mesh backrest and a 20.8 inches wide high-density foam seat cushion that conforms perfectly to the spine. High resilience and high density sponge is durable and not easy to deform for long-time use. 【Ergonomic Design】 The counter height office chair is designed according to the curve of the human body, perfectly fitting the structure of the human body and protecting the body from damage caused by work. This support helps maintain the natural curve of the spine, preventing slouching and reducing strain on the lower back muscle 【Pressure Locking Casters】 Newly upgraded pressure wheels move when pressurised and automatically brake when not pressurised, making them run more smoothly. This helps to maintain the stability and precision of the chair and reduce noise and vibration. 【Sturdy Base】 This tall adjustable office chair features a sturdy metal base that can hold up to 500 lbs and is designed for stability and durability. The high-quality material ensures stability and safety over long periods of time, making it ideal for heavier people! 【W-Shaped Cushion】 Experience Unmatched Comfort: Our 3.15" thick W-shaped cushion features high-elasticity supportive foam and a 20.4” extra-deep seat, providing optimal support for your thighs. This design ensures long hours of sitting without discomfort. The breathable mesh backrest molds to your spine, promoting a healthy sitting posture and keeping you cool, while the soft padded armrests add to your overall comfort.