Thermal Force features an innovative heat-retention system designed for those who work in cold environments. Offering protection and comfort in extreme weather conditions without added bulk, the work boot incorporates such features as an Aerogel insulated toe cap; 3M® Thinsulate™ Zone insulation; and Timberland PRO® “Cold Formula” Ice Trax Rubber Outsole.Timberland PRO, , (888) 802-9947