An ultra light cushioned PhD Running Ultra Light Micro is great for mild weather and shorter distances, without the tan line. Thanks to Realiwool Technology in high density impact zones, these socks are sure to outrun your running shoes.   

Features: 

• 54% Merino Wool 
• 44% Nylon 
• 2% Elastane    
• 4 Degree Elite Fit System    
• ReliaWool Technology      
• Alternating 1x1 welt 
• 1.5" overall height 

Size: 

• Small - 4-6 (US) 2-4.5 (UK) 
• Medium - 7 - 9 (US)  5 - 7.5 (UK) 
• Large - 10 - 12.5 (US)  8 - 10.5 (UK)