I've only used it a little, so it's relatively clean! [Recommended chair pad for those who sit for long hours] Sitting for long periods can put a significant strain on your lower back and other areas. This chair cushion uses high-quality memory foam, which excellently distributes the pressure on your buttocks, providing excellent sitting comfort. It has a three-dimensional structure that envelops and supports your buttocks, making it a low-rebound cushion that allows you to sit comfortably for long periods. [Three-dimensional design that envelops and supports the buttocks] The slight indentation and the sides naturally fit the buttocks, distributing the pressure on them. [W-shaped design at the front] Both sides absorb the pressure on the buttocks well. It gently envelops and fits the buttocks naturally, providing excellent fit. [U-shaped design at the rear] The unique U-shaped structure avoids weak areas such as the tailbone, improving the shortcomings of conventional cushions that compress the tailbone. It reduces the pressure on the tailbone from a seated position, gently cares for the tailbone, and provides comfortable sitting. In addition, this unique design improves the breathability of the cushion, making it less likely to get stuffy even when sitting for long periods. [Memory foam material & high-quality product] It uses memory polyurethane, which firmly supports the body, distributes the pressure on the buttocks, and never deforms even after sitting for long hours. To provide high-quality products, we conduct European standard inspections (RoHS) and clear safety standards! Since we deliver excellent products, it is also ideal as a gift. (This product test number: IKS-002) [Highly breathable mesh fabric & non-slip treatment on the back] The cover is made of mesh fabric, which is highly breathable and does not easily get stuffy. The cover has a zipper, so you can remove and wash it, making it easy to care for. The back is non-slip, so you don't have to worry about the cushion falling off the chair. [Product specifications] Size: (approx.) 38 x 45 x 4-11cm Material: Core material: Polyurethane (high-quality memory foam) Cover: Surface / 100% polyester (breathable mesh material) Back: PVC material (with non-slip and anti-adhesive particles). Please note: Before purchasing, be sure to carefully check the details of the product, such as the size and color. If you are using a memory foam cushion for the first time, it may take 1-2 weeks to get used to the feel of the memory foam.