This is a pelvic support chair from the Style PREMIUM Series. I purchased it new from the official store in November 2024 as a measure against lower back pain. I have been using it, but I no longer need it as I have purchased a new office chair. The urethane is firm and it's in a clean condition, so I've decided to put it up for sale. However, it has been stored at home by a non-professional, so I will sell it to someone suffering from lower back pain who understands this. It seems that a slightly lower chair is suitable for this product. Also, chairs with wooden seats are not recommended as this product is not stable on them. Why not give it a try? Product Details Brand: Style Color: Brown Material: "Structural material: Polypropylene, Cushioning material: Urethane foam, Upholstery: 92% polyester, 8% polyurethane, Bottom rubber: Silicone rubber" Product Dimensions: 44 depth x 46 width x 43 height cm Size: W460 x D440 x H430mm Product Weight: 5 kilograms