These warm-up booties are perfect for dancers to wear between classes and rehearsals. They are designed for adults and come in various sizes (XS: US 13.5 - 1.5, S: US 4 - 6, M: US 6 - 8, L: US 8 - 10, XL: US 10 - 12). The filling is 100% Polyester for warmth and comfort, the shell is 100% Nylon, and it has a cushioned heel. Not recommended to be worn outdoors.