I bought this for my grandmother, who now uses a wheelchair, but it's no longer needed as she's using a different cushion. It's new and unopened. Here's the product description from Amazon: Brand: LeLante Features: Lightweight Color: Navy Size: Approximately 40cm x 40cm x 6cm thick Material: Polyurethane foam Shape: Square 【Cushion Made for Wheelchairs】 "We want to bring smiles to those who use wheelchairs" and "We want to make life in a wheelchair more free." With these thoughts in mind, this wheelchair cushion was created. With the safe and reliable functionality recommended by active physical therapists and an ergonomic design suitable for wheelchairs, experience a more comfortable wheelchair life. 【Newly Improved Design】 To address various concerns such as "I get tired quickly when sitting in a wheelchair," "My buttocks hurt from the vibrations of the wheelchair," and "I'm worried about bedsores if I sit for a long time," we've added a contoured design that fits the pelvis, and non-slip processing for wheelchairs, achieving outstanding stability. 【Recommended by Active Physical Therapists】 The high-density x low-rebound W-fit structure provides higher durability and pressure distribution compared to regular low-rebound cushions and seat cushions. It supports a stable posture even during long periods of sitting. 【Easy to Care For】 The removable "washable cover" can be machine-washed, making it easy to care for. It uses breathable mesh fabric and a large zipper with a wide opening, allowing even women to easily remove the main body. 【Thorough Inspection System by a Japanese Company】 At LeLante, to satisfy all customers who purchase our products, dedicated staff from a Japanese company carefully inspect each item, taking ample time. We meticulously check items for holes, stains, scratches, unpleasant odors, loose stitching, and the smoothness of the zipper's opening and closing, delivering only products that pass these checks. Product size: Approximately 40cm x 40cm x 6cm thick