Used only for a trial sleep, so it's in beautiful condition. It was stored at home in its dedicated storage bag. When I inspected the product for sale, I found a small dent on the bottom surface, as shown in the last photo. The surface where the baby sleeps is not affected. Below is from the official website ↓ 【Supervised by Nobuko Nagamochi, a sleep specialist for babies & children】 Babies can calm their breathing and feel secure when gently cradled as if being wrapped around with a rounded back. This bed maintains the roundness of the back (C-curve) and promotes restful sleep, just like when being held. That is the iimin C-curve bed. ●Inner material / Wadding (100% polyester) ●Side fabric / Breathable mesh (100% polyester) ●Size / Approximately width 47 x length 75cm ●Made in Japan