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You'll wonder how Smartwool managed to squeeze this much intelligent technology into a package so small that doesn't require recharging. PhD Cycling Ultra Light Micro Socks keep your feet dry and comfortable all summer without floodwater tan-lines.

Smartwool builds the PhD Cycle Ultra Light Micro Sock with its 4-degree Fit System, which is comprised of two different types of elastics for enhanced stretch and recovery. Patent pending Relia-Wool Technology in high-impact areas protects your foot from shock and vibration to reduce fatigue. Finally, Smartwool's low-profile toe seam reduces irritation and blistering, so you can ride longer, harder.

The Smartwool PhD Cycle Ultra Light Micro Sock is available in Medium, Large, and X-Large. It comes in Graphite, Silver, and Black.

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