The new and improved PhD Run Ultra Light Pattern Micro features Smartwool’s 4Degree™ Elite fit system, Indestructawool technology for superior durability, and a virtually seamless toe. Men's-specific mesh ventilation zones provide ultimate temperature and moisture regulation where male runners need it most.
45% Merino Wool/50% Nylon/5% Elastane
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™ technology features a patent-pending construction method for exceptional durability and comfort
Men's-specific mesh ventilation zones provide additional breathability and moisture management
Ultra Light Cushion: Minimal cushioning for maximum next-to-foot performance without added bulk