Our New Second Skin Canvas Half Sole, Fits Like A Glove! *Four-way stretch canvas, fits like glove *Hand crafted pleats for a flat even custom fit *Left and right shapes to the curve of each foot *Double elastic under the arch and around the heel *The 2nd strap is silicone lined for a secure fit around the heel *Sole patch is natural suede Fitting: XXS(13-1), XS(2-3), S(4-5), M(6-7), L(8-9), XL(10-11), XXL(12-13)