Back Pain Cushion, Lumbar Support, Posture Corrector, Low Rebound, For Chairs and Cars

I bought this on Amazon in July 2023 after my daughter, who lives in the US, recommended it. I no longer need it, so I would be happy if someone could use it.
When sitting on a chair or the like, it supports the curve of your back, aligns your spine, and maintains a healthy posture. It's a firm memory foam cushion. My husband had severe slouching, but it has improved a little.
It comes with two adjustable straps to prevent the cushion from slipping. An extra extension strap is also included. (See photo 10).
It has a washable 3D mesh breathable cover. Overly elaborate designs can be an eyesore, but this one doesn't stand out much when placed.
Size: 33cm x 32.5cm, Maximum depth 10cm.
I used it for a short period, so the straps feel a little stretched. I don't think it affects usability.
While the exact same item is not currently sold, a very similar item is still available on Amazon under the LOVEHOME brand for ￥17,000 or ￥13,000. It seems to be primarily purchased in the US.
I failed to make a properly sized box, so the packaging is a bit unsightly, but I will ship it securely to ensure it arrives safely.