| RefrigiWear Women's PolarForce® Hiker Boot | Waterproof | Black | Ragg Wool/Leather/Nylon | 10. RefrigiWear Comfort Rating: -30°F to 20°F 800g Insulation Vibram® Q765 Dual Density with Ice Trek™ outsole In case you can’t tell, these boots mean business. With 800g insulation and a 6” nylon/leather upper, these shoes will keep you warm, comfortable and prepared to take on any task. Trek with confidence on any surface, thanks to the Vibram® Q765 Dual Density with IceTrek™ outsole. The ASTM composite safety toe ensures your feet stay protected, while the waterproof construction keeps... - RefrigiWear Women's PolarForce® Hiker Boot | Waterproof | Black | Ragg Wool/Leather/Nylon | 10. |