Crocs Freesail Rainboot 100% Croslite Imported Synthetic sole Shaft measures approximately 11.5" from arch Boot opening measures approximately 15" around Dual comfort foam footbed on top of a croslite foam midsole Fit suggestion for 1/2 size recommended to size down Slimmer, sleeker shape made with fully molded croslite Lace detail at collar Rubber outsole to improve traction