Muck Boot Women's Ryder Mid Boot 100% Synthetic Imported 4mm CR Flex Foam bootie with 4 way stretch nylon Rubber sole Shaft measures approximately 10.75" from arch Heel measures approximately 1.5" Platform measures approximately 0.5" Boot opening measures approximately 13.5" around 100 Percent waterproof lightweight and flexible Xpress cool lining material keeps your feet cool in warm weather and is antimicrobial Etc sock liner to reduce friction from heat buildup Durable lightweight rubber outsole Wide cut heel base for stability