This is a dedicated cushion for the bikke rear child seat. Please note that this is a seat for sale, not a child seat itself. Please confirm this before purchasing. It was initially set on the bicycle when I bought it, but I wanted a different color, so I bought this at the same time. Therefore, this one has never been used and was removed. Since it was initially set, I'm classifying it as "near new" rather than brand new. Please refrain from purchasing if you are sensitive to the fact that it is not a new, unused item in a bag. Shipping is planned via Rakuraku Mercari Bin, but may be changed to Yu-Yu Mercari Bin. Please understand.