These Adult Swirl Print Ankle Warm Up Booties are perfect for dancers during classes and rehearsals. They are designed by experts and offer great warmth. The filling is 100% Polyester for comfort, has a cushioned heel, and a 100% Nylon Shell. Not for outdoor wear. Sizing: XS (US 13.5-1.5), S (US 4-6), M (US 6-8), L (US 8-10), XL (US 10-12).