4 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to your foot shape to resist blisters and chafing Anti-microbial XpressCool fabric lining pulls moisture away from skin to keep feet cool and dry in warm weather; comfort rated from 40 °F to 95 °F (4 °C to 35 °C) Steel shank for support; Vibram rubber outsole for traction on varied terrain; 16-inch height for added protection Triple toe and quadruple rubber heel reinforcement for extra protection and durability 100% waterproof work boots; Spandura treatment offers maximum abrasion resistance; etc Sockliner reduces friction and heat build up