Amazon.com: RefrigiWear Extreme Pac Boot - Insulated Cold 。These RefrigiWear Extreme Pac Boots are the perfect addition to your workwear collection. With a round toe and Boa Fit System closure, they provide both comfort and safety. The boots feature a VitaComfort Anti-Fatigue & Moisture Management System, making them ideal for outdoor activities during the winter season. The boots are made of leather with a polyester lining material and have a rubber outsole for slip-resistant traction. They are electrical hazard compliant and come with a slip-resistant rubber heel plate. The boots are available in size 11 and have a standard shoe width. The black, green, and gray color scheme adds a touch of style to the boots, making them perfect for any occasion.