The Propulsion boots comes equipped with abrasion resistant mesh upper material, and the Caterpillar proprietary DUOFUSE midsole technology, combining rubber and foam for a soft ride from sun-up to sundown. The Propulsion has an extreme slip and oil resistant outsole, perfect for a variety of work environments, both indoors and out. It's a sneaker-style athletic work boot with composite toe, built to withstand tough industrial work environments, while still offering comfort, flexibility and a pop of the Caterpillar signature Cat yellow.