PhD Pro Endurance Krar Print Crew Men's

Smartwool athlete and ultrarunner Rob Krar came to Smartwool to make a sock that can handle the longest trail runs. Introducing the PhD® Pro Endurance Krar Print Crew. 

This running sock features Indestructawool™ technology for enhanced durability, a Virtually Seamless™ toe for added comfort, and a 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.

• Sock Height: Crew
• 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
• Virtually Seamless™ toe for enhanced comfort
• 7.5" overall height
• Made in USA of Imported Yarn: 57% Merino Wool 38% Nylon 4% Elastane 1% Polyester