MuckBoots Women's Breezy Low Slip-On,Blue/Sunburst,5 M US 100% Synthetic Imported 4mm CR Flex Foam bootie with 4 way stretch nylon Synthetic sole Heel measures approximately 1.5" 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