| RefrigiWear OnyxRidge™ Hiker | Waterproof | Black | Ragg Wool/Leather | 11.5. RefrigiWear Comfort Rating: -20°F Anti-Slip RefrigiWear® outsole perfect for icy surfaces and concrete freezer floors ASTM composite safety toe The cold will never break your stride in the OnyxRidge™ Hiker. These boots are built to defy the cold and keep you going strong. With 600g insulation and a 6" buffalo leather upper, they provide the ultimate combination of warmth and durability. The anti-slip RefrigiWear® outsole ensures superior traction on icy surfaces and concrete freezer floors.... - RefrigiWear OnyxRidge™ Hiker | Waterproof | Black | Ragg Wool/Leather | 11.5. |