Here's a waterproof, composite-toe work boot built for your longest days on the job Part of the new GroundFlex4™ series of work boots from CAT® Waterproof full-grain leather upper for durable protection Pull-on style with dual elastic side panels Nylon mesh lining and footbed cover for breathability Dual-density EASE footbed for shock absorption Durable cemented construction ERGO technology with biometrically engineered features for stability, flexibility and comfort Molded polyurethane midsole SRX T1300 slip-resistant rubber outsole for traction even on wet and oily surfaces Sole is also heat and abrasion resistant Nano toe is a composite safety toe that is 40% lighter than a similarly rated steel toe Composite safety toe meets ASTM F2413-11 standards Electrical Hazard-safe design meets ASTM F2413-11 EH standards