This 100% waterproof, windproof, and breathable mid length sock featuring Hydrostop is perfect for use in a wide variety of weather conditions.Hydrostop provides a more secure fit between the top of the sock and your leg, reducing the chance of water getting through and enabling you to go out and stay out whatever the weather Three-layer construction for warmth, durability and waterproofingMerino Wool lining provides moisture control, insulation and comfortStrategically placed elastic zones offer extra support Footbed padding reduces pressure and absorbs shockFlat toe seams prevent rubbing