- Made of 100% premium waterproof synthetic leather and TPU. SL-TEX waterproof membrane prevents water from entering and volatilizes water vapor. Ultra-lightweight: 1.4lb (size 11)- 800g synthetic rabbit fur lining keeps your feet warm and dry even when the temperature is -25F/-32C. Provides about 1½ times the warmth of other high-loft insulation materials, when equal thicknesses are compared.- TPU insulation shell brings all-around waterproof and windproof, providing better protection in bad weather. Gusset tongues to further prevent cold and snow from entering the boots.- Anti-collision toe cap protects the toes from injury. The padded neckline provides strong ankle support and prevents sprain. The removable warm padded insole provides all-day support and comfort. Features a lace-up for an adjustable, secure fit.- Flexible EVA midsole bring superior cushioning and high energy return, reduces foot fatigue, and absorbs shock. Advanced traction rubber sole provides a stable and reliable grip in a variety of environments. Designed for winter daily lives and outdoor sports, such as hiking, skiing, snowmobile, ice fishing, hunting, jungle, backpack, mountaineering, travel, etc.