The Women's Crow Waterproof boot combines the comfort and warmth of natural shearling with the performance of a 100% waterproof inner bootie and a 200-gram PrimaLoft lining. To help maximize comfort the Crow Waterproof offers the unique ULU lacing system for a secure fit. A shearling-lined removable insole keeps feet warm and comfortable while a rugged outsole provides exceptional winter traction.