12cm Thick Height Adjustable Seat Cushion (Black) - Brand: SJTD Car Booster Seat Cushion Portable Car Cushion for Short People Car Seat Cushion Pad with Handle For Car, Office, Home Approximately 40cm x Approximately 40cm x Approximately 12cm Soft, Thick Cushion with Soft Fabric Used for 3 days in the office due to lower back pain. Selling because it was too soft for me. Because the seat height increases, it's easier to stand up. This year, I experienced a shocking debut of lower back pain. I'm listing several items as a result of trial and error... It's a matter of compatibility, so please rest assured that the items are not defective. #ThickCushion #HeightAdjustableCushion #LowerBackPain #SeatCushion #CarSeatCushion #PriceReduction