Our lightest workboot features the Powerfit comfort systems: Premium waterproof and waterproof/ breathable membrane. Polyurethane midsole with high-rebound heel insert that provides durable cushioning and energy return. Nylon diffusion shank for torsional rigidity. Anti-microbial, contoured open-cell polyurethane footbed provides durable, resilient cushioning while molded heel cup cradles the heel. Outlast Adaptive Comfort footbed cover regulates temperature. Titan safety toe cap for lightweight protection. Timberland PRO rubber dual-density outsole provides slip-resistance, oil resistance, and an abrasion resistant construction.