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. Features Include: ASTM F2413-11 Composite Safety Toe protects against impact or compression ASTM F2413-05 1/75 EH Electrical Hazard Protection rated to protect against open circuits up to 600 volts in dry conditions Cement construction for durability Nylon mesh and NXT lining for added durability and odor-defense Nylon Shank for added support and stability SRX Best-in-Class, Slip-resistant Rubber Outsole reduces the risk of slips and falls on low traction surfaces