Composite Toe: Left And Right Asymmetrical, Non-Metallic Carbon Toes, A Composite Material, Offer An Unobtrusive Fit And Are 15% Lighter Than Steel; These Work Boots Meet Or Exceed Astm F2412 And F2413 M I/75 And C/75 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; The Red Hook Mid Work Boots Have A Mesh Liner That Integrates With The Waterproof Membrane Traction: Oil- And Slip-Resistant, Non-Marking, Rubber Outsoles Are Used For Improved Traction That Meet Or Exceed Astm F1677 Mark Ii And Astm F2913 Satra Non-Slip Testing Standards; Non-Mutilating Uppers Reduce The Chance Of Marking Surfaces Support: These Boots Are Made With Reflective Webbing For Additional Safety And Visibility, And 100% Non-Metallic Construction For Passing Through Metal Detectors; A Nylon Shank Used For Midfoot Support, And Torsion Stability Comfort: Made With Keen.Regen A Lightweight, Compression-Resisting Midsole Providing 50% More Energy Return Than Standard Eva Foam For Lasting Support And Comfort; Cleansportnxt Provides Natural Odor Protection Using Probiotics