This boot runs small size up!!! Explorer Women's Sorel Boot is a waterproof boot for winter fashion and function. This lightweight boot striks the right balance between sneaker-like comfort and boot performance. It's waterproof and warm, featuring waterproof bootie construction and 100g synthetic insulation as well as a microfleece lining. The 6 1/2 inch shaft delivers mid-height coverage, allowing you to step through snow-covered sidewalks and paths. A molded EVA midsole with molded rubber outsole with ground contact EVA cushions underfoot, for getting through the day with a spring and traction in every step.