DECENT FEATURES of the Smartwool PhD Running Ultra Light Micro
- New 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
- Patent pending ReliaWool Technology in high impact areas provides the longer lasting protection to keep feet comfortable
- Alternating 1 x 1 welt
- 1.5" overall height
The SPECS
- Height: Micro
- Cushioning: Ultra Light Non Cushion
- 54% Merino Wool, 44% Nylon, 2% Elastane


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