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
Ultra Light Cushion
Non-cushioned for maximum performance in close-fitting shoes
Shred Shield™
Shred Shield helps reduce wear from toes