A new and improved classic. The new PhD Outdoor Heavy Pattern Crew features ReliaWool technology for improved durability in the high wear areas and the 4 Degree elite fit system, to keep the sock in place and give you all-sport versatility.PhD Built for Performance in the Highest Degree4 Degree? Elite Fit System 4 Degree? Elite Fit System4 Degree? Elite Fit System Patented ReliaWool? technology in high impact areas provides superior durabilityHeavy Cushion Heavy cushioning offering significant impact absorption for extended backcountry excursionsMachine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.
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