This item has interfacing throughout, quilt batting, and a double layer of thick quilt batting on the sole. The price is almost entirely the cost of materials, so please refrain from price negotiations. Quilt batting is used in the instep and heel areas. Two layers of extra-thick quilt batting are used on the sole. An additional layer of extra-thick quilt batting is added to the heel. M size: Sole width 10cm, Length 24.5cm L size: Sole width 10.5cm, Length 26cm M size is suitable for those with feet 23cm or less. L size is suitable for those with feet 23.5cm or more. However, it is best to refer to the actual dimensions above. Please note that the item will be shipped flat. #Liberty #RoomShoes