We teamed up with Smartwool athlete and ultrarunner Rob Krar to make a sock that can handle the longest trail runs. Introducing our PhD® Pro Endurance Krar Print Crew. This running sock features Indestructawool™ technology for enhanced durability, our Virtually Seamless™ toe for added comfort, and our 4 Degree™ elite fit system for a dialed, performance-oriented fit—so you can stay confident on the most rugged trails. And body-mapped mesh zones keep things breathable mile 1 to mile 100. Get ready to rack up more miles than ever before.
- Rob Krar signature sock
- Indestructawool™ technology for enhanced durability
- 4 Degree™ elite fit system for a dialed-in, performance-oriented fit
- Shred Shield™ technology reduces wear from toes
- Body-mapped mesh zones for added breathability
- Sock Height: Crew
Cushioning: Ultra Light Cushion - The absolute minimum between you and your shoes.