Grubs Steel Safety Toe Knee Height Wellington Boot | Perfect for Muck, Snow and Mud Rubber rubber sole MOISTURE WICKING & BREATHABLE: Dry happy feet, all day long STEEL SAFETY TOE: Conforms to EN ISO 20345 S5 Safety Footwear Standards. EXCELLENT GRIP: Great traction for all surfaces from deep mud to slick steel and concrete. 100% WATERPROOF: Waterproof the whole way to the top means you can just hose off to clean. Give rain and snow, mud and muck the boot! SOFT STRETCHY UPPER: Top part stretches to accommodate a wide calf.