Men's Timberland Pro TP Gridworks Work Boots Our Timberland PRO® Gridworks work boots take on freezing, oily, slippery, and rough terrain, with lightweight, cold-formula outsoles built for traction. Their job site performance features include rugged, premium Timberland® full-grain, waterproof leather uppers with an internal waterproof membrane that offers maximum waterproof protection and blood-borne pathogen resistance, Anti-Fatigue Technology footbeds that absorb shock and return energy to your feet with every step, and a breathable, moisture-wicking lining made of ReBOTL™ material containing at least 50% recycled plastic with an antimicrobial treatment for odor control. Plus, alloy safety toes and electrical hazard protection infuses these durable boots with the extra safety you need.