I accidentally bought two of these online instead of one, so I'm selling the unopened one. Personally, I found it comfortable to sit on, with a good balance of softness and resilience. Purchased in September 2025 from Rakuten Ichiba. Below is the product information: Three-Dimensional Honeycomb Gel Cushion [Seat Cushion, Shock Absorption, Reduces Burden on Hips and Lower Back] Manufacturer: Takeda Corporation Model/Part Number: SJHG4337 ●Size (approx.): 43 x 37 cm ●Thickness: approx. 9 cm ●High-elasticity gel resists deformation, providing comfort even after sitting for a whole day. ●Two-layer honeycomb structure excels at shock absorption, absorbing and distributing body pressure to reduce strain on the hips and lower back. ●Honeycomb structure allows for excellent air circulation, preventing stuffiness even during prolonged sitting. ●Washable dedicated cover (black) Specifications: ■Materials: ●Body: TPS (Thermoplastic Styrene Elastomer) ●Cover: Polyester