KEEN FOR COMFORT: Left and right asymmetrical safety toe, uniquely anatomically correct steel, aluminum, and composite toe designs provide a roomier toe box and maximum comfort; meets ASTM testing standards. SAFETY FIRST: Features KEEN.Heel, an integrated heel guard for protection from bumps and scrapes KEEP DRY: Features KEEN.Dry, a proprietary waterproof, breathable membrane that lets vapor out without letting water in ON YOUR FEET: Features KEEN.Grip oil- and slip-resistant outsoles that meet ASTM nonslip testing standards. AMERICAN BUILT: The Coburg is assembled in Portland, Oregon, with a minimal-waste design using the finest materials from around the world