Originally, this was an inner boot for L.L.Bean snow boots or ski boots. There's no material tag, but it's a thick, felt-like material. I think it has good insulation. The shape is firm. The tag says "kids 6," but I think it's for youth size 6, around 24cm. The outer size was 25.5cm. It's a US size, so it's narrow. - Size: Kid's 6, but I think it's good for those who wear 24cm. The outer size of the inner boot is 25.5cm. - Color: Gray - Country of Manufacture: China Thank you for viewing. When shipping, I will fold it at the shin area. Please understand. Shoe length: High cut