The Timberland Pro Resistor is the original, classic, all-purpose waterproof work boots. With composite safety toes, dynamic technology and rugged all-weather outsoles, These men's insulated work boots have the performance you're looking for. Dual-density technology absorbs shock and returns energy at key zones of the footAll-weather thermoplastic urethane (TPU) outsole features an abrasion-, slip- and oil-resistant sole, tested for volume swell using EN345 TMP.