Smartwool's PhD Run socks include all of the latest technological advances including, Indestructawool durability, and Shred Shield which prevents wear, to create a functional and durable sock. This sock also includes an Achilles tab to prevent slippage into footwear, Virtually Seamless toe design to have added comfort, and 360 degree Print Technology. 

• 4 Degree Elite Fit System
• MEsh Venting 
• Ultra Light Cushion
• Care: Machine Wash Warm Inside out; Tumble Dry Low; Do not Bleach; Do not Iron, Do not Dry Clean. 
• MADE in the USA with imported yarn
• Fiber Content: 57% wool 40% nylon 2% Elastane 1% Polyester
• SMARTWOOL US WOMEN'S SIZES: Small: 3-5.5, Medium: 6-8.5, Large: 9-11.5, X-Large: 12-14.5
• SMARTWOOL US MEN'S SIZES: Small: 3-5.5, Medium: 6-8.5, Large: 9-11.5, X Large: 12-14.5
• SKU # : SW001463A22