The Ultimate Endurance Run Sock
The PhD® Pro Endurance was designed, built, and tested with top ultrarunner Rob Krar. We’ve fused his insights with our performance innovations to bring you an elite sock that features highly specified cushioning, unwavering fit, and premium materials in order to crush long distance runs.
- Malleolus ankle and Achilles heel cushion designed for protection on rugged trails
- Shred Shield™ technology significantly reduces wear from toenails
- Indestructawool™ technology adds durability for enduring performance
- 4 Degree™ Elite Fit System for a dialed, performance-oriented fit