I've used this for about six months. I'm selling it because I replaced my chair. I would appreciate it if you could agree to use Eco-Mercari delivery on the purchase screen. There are no signs of wear or damage. It appears that something like dust has gotten into the mesh fabric. There are some small white spots in the first photo. I tried to remove them, but I couldn't because I didn't want to tear the fabric. I washed it by hand with laundry detergent and dried it thoroughly. I am not a professional, so please refrain from purchasing if you are concerned. [Size] Approximately width 43 x 39cm, thickness 8-10cm, body weight: approximately 850g. This is a chair cushion with durable urethane, a breathable and comfortable mesh cover, and a cushion with a comfortable firmness. [Two-layer structure] It has a two-layer structure: 3cm high-resilience urethane on the bottom + 5cm low-resilience urethane chips on top (Utility Model Registration Certificate No. 3244666). It sinks in slowly while providing firm support. It distributes body pressure evenly, achieving a soft and stable sitting comfort, and significantly reduces the burden on your body.