ADVANCED TECHNOLOGY FOR THE ULTIMATE COMFORT - THE SMARTWOOL PHD RUN LIGHT ELITE STRIPED MICRO SOCK. These socks are designed for runners who want more comfort and a better fit. The Smartwool PhD Run Light Elite Striped Micro Sock features mesh ventilation zones to increase breathability and comfort. The Light Elite cushioning provides impact protection with strategically-placed cushioning on the ball and heel of the foot. You'll appreciate the narrow, women's specific fit and the two elastics that work together to keep this sock in place. FEATURESLightweight socks for running on the road or trailMerino wool naturally resists odorsSynthetic material is breathable and stretchyLow height for a minimalist lookLightweight cushion allows a natural feelTECH SPECS56% merino wool, 41% nylon, 3% elastane