Size Chart For socks that help feet stay warm on the tram and perform on the trail, grab the Women's PhD(R) Ski Light. Designed around a woman's foot, these socks offer women's-specific fit and mesh zones for breathability. Featuring a light-cushioned shin and sole, the 4 Degree(TM) elite fit system for a dialed fit and ReliaWool(TM) technology for durability. Features: - PhD(R): Built for Performance in the Highest Degree - Women's Specific Fit: Narrower profile provides perfect women's specific fit - 4 Degree Elite Fit System: Uses two elastics for greater stretch and recovery to keep the sock in place - Patented ReliaWool(TM) technology in high impact areas provides superior durability - Women's-specific mesh ventilation zones provide additional breathability and moisture management - Light cushioned shin and sole for impact absorption and warmth - Narrower profile provides perfect women's specific fit - Flat knit durable toe seam - 13" overall height - Sock Height: Over the Calf - Knit in USA of Imported Yarn: 55% Merino Wool, 43% Nylon, 2% Elastane - Last Chance: Discontinued Style - Only available to ship within the USA