Transforming cushion, suitable for back and lumbar support. Perfect size for back and lumbar support. When opened, it's ideal for lumbar support or elevating your legs. When buttoned up, it becomes a compact shape that can also be used as an armrest. Shape can be changed according to your needs. I have kept it in storage, unused. For someone who will use it. Please consider this item with the understanding that it has been stored at home. 〈Size〉 Closed: 22cm x 15cm x 15cm per side Opened: 35cm x 15cm x 15cm per side