Capezio FootUndeez provide protection and security and are designed to form and move with the foot. FootUnders® are perfect for modern, lyrical, gym, ballet, yoga & Pilates. Wear them in side of your favorite dance or street shoe for added protection, cushion and comfort. Knitted polyester upper with sewn-on criss cross elastic straps. Suede sole and insole. Shoe should fit snug like a sock. Fitting: begin with street shoe, for half sizes or W widths go up a size. P(4-5), S(6-7), M(8-9), L(10-11), XL(12-13), XXL(14-15)