POLBAN ADVANCE Hip seat Used for about 6 months to 1 year. It shows signs of use, but there is no noticeable damage. The single shoulder strap was hardly used and stored in the pouch, so it's in good condition with no noticeable damage. It was convenient when the child fell asleep. I am not considering selling the shoulder strap separately. I have washed it for the sale. Please refrain from purchasing if you are sensitive to smells. Color: Denim Black POLBAN ADVANCE is a highly functional model in the POLBAN series, with over 300,000 units sold, and is designed for active use. Unlike hip seats made overseas, it incorporates the voices of many Japanese mothers and is designed to fit Japanese parents and babies with a smaller design, while still allowing for stable carrying even as the baby grows. Popular model: POLBAN ADVANCE