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
Indestructawool™ - Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort
Mesh Venting - Men's-specific mesh ventilation zones provide additional breathability and moisture management
Light Elite Cushioning - Impact protection with targeted cushioning on the ball and heel of the foot. Designed for a precise fit in performance boots.