Use these warm-up booties between classes and rehearsals. They're perfect for dancers. The filling is 100% Polyester for warmth and comfort, with a 100% Nylon Shell. The heel is cushioned and there's a BLOCH rubber logo badge on the strap. They're not for outdoor use. Sizing: If wearing with pointe shoes, take the next size up from your normal shoe size. XS: US 13.5 - 1.5, S: US 4 - 6, M: US 6 - 8, L: US 8 - 10, XL: US 10 - 12