THE ULTIMATE SOCK FOR THOSE WHO LOVE TO RUN - THE SMARTWOOL PHD RUN LIGHT ELITE PRINT MICRO SOCK. These socks are specially-designed to provide shock absorption and ventilation to runners. The Smartwool PhD Run Light Elite Print Micro Sock features Light Elite cushioning in the ball and heel of the foot and mesh ventilation zones so your feet will be cool, comfortable, and protected from impact, all while maintaining a volume-minimal form. The Virtually SeamlessGao toe prevents chafing and discomfort. FEATURESFeatures a more narrow profile that's perfect for a woman's foot.4-DegreeGao Elite Fit System construction uses two elastics to provide better stretch and to keep your sock in place.IndestructawoolGao is engineered to provide maximum comfort and durability.Light Elite Cushioning provides targeted cushioning designed for runners at the ball and heel provides added protection in high impact areas.Achilles tab in back helps prevent the sock from sliding down.Mesh panels on the out step help provide added breathability.Virtually SeamlessGao toe is designed for all day comfort and to minimize chafing.Shred ShieldGao reduces wear and tear on the toes for added durability.TECH SPECS56% wool, 41% nylon, 2% elastane, 1% polyester.