TIMBERLAND PRO. A1RVF001. MENS DRIVETRAIN COMPOSITE TOE WORK SHOES. BLACK SYNTHETIC. Our metal-free Drivetrain men s work shoes pack a ton of tech into a low profile. Composite safety toes powered by CarbonShield technology electrical hazard protection and all-weather outsoles make these one of our most powerful PRO collections yet. Mesh linings with antimicrobial treatment. Fiberglass shanks. Cement construction. Non-marking all-weather TPU thermoplastic urethane outsoles are slip- oil- and heat-resistant up to 248 degrees Fahrenheit.