Nishikawa Keeps Pelvic Support Cushion Product Condition: Almost no signs of use. The box has minor scratches, but I personally think it's in good condition(^^) Material: Polyurethane foam Shape: Square Size: Width 44cm x Length 41cm x Height 18cm [Outer Fabric Composition] Surface/Sides: 100% Polyester (Antibacterial Treatment) Back: 65% Polyester, 35% Polyurethane (Non-slip Treatment) [Filling] Urethane Foam Country of Origin: China The "Keeps" support cushion maintains a comfortable posture simply by placing it on your usual chair. It gently supports your buttocks, providing comfortable posture even when sitting for long periods. For those whose chairs at home or in the office are hard and make it difficult to concentrate, or who experience back pain while sitting. It naturally supports your sitting posture. It uses rich urethane material with high elasticity and excellent pressure distribution, so it's not too hard or too soft, and the moderate firmness envelops your buttocks, providing comfort even when sitting for long periods. It can be easily used by simply placing it on your usual chair for long hours of desk work or hobbies. Correct posture means that your ears, shoulders, and hip joints are in a straight line. The ischial pocket is designed to position the pelvis in an ideal posture. By sitting with your ischial bones fitting into the ischial pocket, it prevents your posture from collapsing forward, and supports at the sacral point, leading to an ideal sitting posture, so you can easily maintain the correct posture just by sitting. When sitting without a cushion, approximately 85% of the pressure is concentrated on the ischial bones. When using the Keeps cushion, the pressure on the ischial bones is reduced to approximately 30%. From Tama's Shop: The color may appear different depending on the camera and lighting. Please understand that this product has been handled by a person once, and that it is a product inspected by an amateur and stored personally. The product contents are only those shown in the images. Please check the product condition in the photos carefully before purchasing. Please inquire before purchasing if you have any questions. #Click here for all Tama's Shop products ↑Click here to see other products. Thank you for viewing!