Go forth in comfort in the resilient Sorel Whistler Mid Boot, designed to keep you warm down to -25 degrees F. This boot has a bundle of features specifically designed for cold and wet weather, including a waterproof upper, OutDRY waterproof construction, 200g insulation, and a genuine wool collar and lining. Insulated with temperature rating of -25 degrees F OutDRY waterproof construction 200g insulation Genuine wool collar and lining