Keen Utility - Men's Leavenworth (Steel Toe) 400G Insulated Waterproof Work Boot 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 STAY WARM: Features KEEN.Warm, a lightweight insulation that provides warmth where you need it the most and a thermal heat shield footbed that keeps the cold out and the heat in WORK ALL DAY: The KEEN Metatomical Footbed design is an internal support mechanism that is anatomically engineered to provide excellent arch support and cradle the natural contours of the foot KEEP DRY: Featuring KEEN.Dry, a proprietary waterproof, breathable membrane that lets vapor out without letting water in AMERICAN BUILT: The Leavenworth is assembled in Portland, Oregon, with a minimal-waste design using the finest materials from around the world