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 a wide metatarsal guard for added impact resistance and Kevlar thread protection from abrasion, sparks, and heat KEEP DRY: Features KEEN.Dry 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 Mt Vernon is assembled in Portland, Oregon, with a minimal-waste design using the finest materials from around the world