Composite Toe: Left And Right Asymmetrical, Non-Metallic Composite Toes Are 10% Lighter Than Steel, Offer An Unobtrusive Fit And Meet Or Exceed Astm F2412 And F2413 Eh Standards Waterproof: Keen.Dry Is A Waterproof, Breathable Membrane Liner That Lets Vapor Out Without Letting Water In For Keeping Your Feet Dry And Comfortable; This Boot Does Have A Liner That Integrates With The Waterproof Membrane Traction: Oil- And Slip-Resistant, Non-Marking, Rubber Outsoles Combined With Keen.Polar Traction Micro-Glass Fibers Technology Create A "Micro Cleat" Effect For Increased Ice Traction Insulated & Non-Metallic: 400G Keen.Warm Insulation For Extra Warmth In Colder Environments; 100% Non-Metallic Construction Allows For Easily Passing Through Metal Detectors In Highly-Secured Areas Underfoot Protection: Electrical Hazard (Eh)-Rated Footwear Provides A Secondary Source Of Protection Incase Accidentally Coming Into Contact With Live Electrical Circuits; 90 Degree Heel Provides Stability And Helps "Catch Or Lock" The Foot In Place