I'm selling this arm holder, which I bought on Amazon for about 3000 yen, as I no longer need it. It's new. I've disposed of the packaging, so it's just the product itself for sale. Excerpt from the product page: Thank you for viewing! ✨ Safe design supervised by doctors and physical therapists! This arm holder provides firm support for your arms and shoulders while being comfortable and easy to use for extended periods. ✅ One-touch attachment: Easy to put on and take off with one hand. Suitable for those undergoing rehabilitation and children. ✅ Non-slip design: Reduces strain on the shoulders and neck, maintaining a natural posture. ✅ Soft material: Breathable and comfortable against the skin. ✅ Wide size compatibility: Perfect for children and smaller individuals with heights ranging from 120 to 150cm. ✅ Supervised for peace of mind: Reliable quality with dual supervision by doctors and physical therapists.