Grubs Steel Toe Rubber Boots | Perfect For Muck, Snow, Rain | Waterproof & Breathable Rubber, Neoprene DRY AND COMFORTABLE: Moisture wicking liner for dryness. STEEL SAFETY TOE: Conforms to EN ISO 20345 S5 Safety Footwear Standards. WIDE COMFORT RANGE: Can be worn comfortably in temperatures of 14-85 Farenheit. EXCELLENT GRIP: Great traction for all surfaces from deep mud to slick steel and concrete. 100% WATERPROOF: Waterproof the whole way to the top. Top part stretches to accommodate a wide calf. Give muck and mud, rain and snow the boot!