The SmartWool PhD Outdoor Ultra Light Micro men's sock used SmartWool's proprietary 4 Degree Fit sport support system to give you the ultimate in support and a secure comfortable fit around your foot's heel arch and instep. The PhD Outdoor Ultra Light Micro sock uses ReliaWool Technology in high impact areas providing longer lasting protection and a more comfortable feel. Mesh ventilation zones allow your feet to breath. The SmartWool sock is a low profile with a seamless toe.
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