The incredibly grippy Womens Arctic Apres Lace Boot from Muck Boots is completely waterproof & makes getting ready to venture out into the cold an absolute breeze. This superbly elegant winter boot features a Vibram Arctic Grip™ sole which grips securely in the most treacherous conditions & a warm & a cosy fleece lining for added warmth, all formed around a super-easy pull-on style. Features 100% Waterproof Vibram Arctic Grip™ outsole for unrivalled traction on ice Fully lined with 5mm neoprene for flexibility Fleece lining for warmth Lightweight EVA midsole for added comfort Temperature rating: 10°C to -30°C Glossary EVA (Ethylene Vinyl Acetate) is a dense foam used in the footbed of many shoes because of its durability & excellent shock absorption properties. Vibram® Outsole – refers to a patented tread pattern that is engineered for excellent traction.