Product Review

A new and improved classic. The new PhD Outdoor Heavy Over the Calf 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 Degree

4 Degree? Elite Fit System Uses two elastics for greater stretch and recovery to keep the sock in place

ReliaWool? Patented ReliaWool? technology in high impact areas provides superior durability

Heavy Cushion Heavy cushioning offering significant impact absorption for extended backcountry excursions

Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.