PhD®
Built for Performance in the Highest Degree
4 Degree™ Elite Fit System
For a dialed, performance-oriented fit with flex zone at ankle joint
Indestructawool™
Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort
Mesh Venting
Mesh ventilation zones provide optimum moisture management and maximum breathability
Light Elite Cushioning
Maximum impact protection with targeted cushioning on the ball and heel of the foot. Designed specifically for runners.