Bogs Women's Classic Winter Plaid Wide Calf-W 100% - 55% Neoprene/45% Rubber Imported Rubber sole Durable hand lasted rubber with four way stretch inner bootie Insulated with 7 millimeter neoprene Dura fresh lining activates to fight odors Max-wick moisture wicking lining Comfort rated to -40 degrees Fahrenheit or -40 degrees celsius