The Smartwool Ski Full Cushion Alpine Edge Sock is a warm sock for skiing. This full cushion ski sock comforts at the front of shin, across the top of the foot, along the bottom, and back behind the heel. All the extra softness needed for long days on the slopes or in the backcountry, plus the temperature-regulating blend of Merino wool, nylon, recycled nylon, and elastane. Constructed with the 4 Degree Elite Fit System, the performance fit won't move or bunch inside your ski boots.