Our PhD Outdoor Light Crew features Reliawool Technology for improved durability in the heel and toe and the 4-Degree Elite Fit System, to keep the sock in place and giving you all-sport versatility.
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
Patented ReliaWool™ technology in high impact areas provides superior durability
The ideal cushion for varied trail and road terrain