Smartwool PHD Ski Pattern Light Women's Socks - AW15 - Small - Red 4 Degree Elite Fit System - Provides more comfort and support by using two elastics for greater stretch and recovery keeping the sock in place. Patented Relia Wool - Addeds durability in high impact areas for longer lasting protection to keep feet comfortable. Flat Knit Durable Toe Seam - For high burst of strength. Strategically Placed Mesh Ventilation Zones - For full foot breathability.