Muck Boots Arctic Ice Mid BootWith 5mm of CR Foam fleece lining wrapped in our soft rubber outer layer your feet will stay warm and dry in most extreme temperatures. And since the outsole features Vibram Arctic Grip compound, you can rest easy walking on the iciest of pathways. 5mm CR Flex Foam Warm Fleece Lining Extended Rubber Exterior Comfort Midsole Vibram Arctic Grip Outsole Women's Last Spandura