Features of the Danner Men's Caliper 6 Inch Boot- Aluminum Toe Durable, full-grain leather Upper Danner Dry waterproof protection and breathable mesh lining options Danner Dual Layer Comfort Footbed with memory foam and PU provides instant and long-lasting comfort Memory foam strobel sock offers additional cushioning underfoot PU Midsole offers shock absorption and lasting rebound Fiberglass shank Danner Caliper oil-and-slip-resistant rubber Outsole offers versatile indoor and outdoor traction with a low-profile 90Adeg heel Aluminum toe meets or exceeds ASTM F2413-18 I/75 C/75 EH Electrical hazard protection ASTM F2892-18 EH