Bogs Men's Workman Boot 100% Neoprene Rubber sole Natural hand-lasted rubber upper with a four way stretch inner bootie ASTM approved chemical and slip-resistant non-marking and self-cleaning deep lug outsole Molded EVA sockliner with Aegis Thermo molded midsole with sbr/cr sock conforms to the shape of your foot Comfort rated from temperate to sub-zero conditions