HIGH-LEVEL PERFORMANCE AND COMFORT - THE SMARTWOOL PHD CYCLE ULTRA LIGHT MICRO SOCK.Compared to the low-cut version, the Smartwool PhD Cycle Ultra Light Micro Sock offers minimal coverage while your run or cycle. Shred ShieldGao technology reduces wear from toes, IndestructawoolGao technology provides ultimate durability, and activity-specific mesh zones help your feet stay dry and happy. FEATURESMerino fibers naturally repel unwanted odor for lasting freshnessMesh ventilation zones keep feet cool and dry on hot afternoonsShred Shield helps reduce wear in toe area for long-lasting wearIndestructawool technology offers high durability and comfortVirtually Seamless toe construction reduces rubbing and hot spots4 Degree Elite Fit System delivers a performance-oriented fitMicro height sits at the height of your shoes for style and comfortTECH SPECSMaterial: 50% nylon, 46% merino wool, 4% elastane