Crocs Beach Patented Closed Cell Resin (PCCR) Incredibly comfortable sandals Slip-resistant, non-marking sole Resists odor Crocs soften as you wear them! XS (W 4-5), S (W 6-7), M (W 7-8, M 6-7), L (W 9-10, M 8-9), XL (M 10-11), XXL (M 12-13)