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Smartwool PhD Run Ultra Light Low Cut Socks

Size Guide

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  • Smartwool PhD® Run Ultra Light Low Cut running socks contain soft, targeted padding placed where runners need it most: on the ball and heel of the foot. These socks are low-cut height making them an ideal balance of protection and comfort. View our Smartwool Collection.
  • Material: 48% Merino Wool, 47% Nylon, 5% Elastane.

    Special Features:

    PhD®® built for Performance in the Highest Degree.

    4 Degree™ Elite Fit System for a dialled, performance-oriented fit with flex zone at ankle joint.

    Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort.

    Mesh ventilation zones provide optimum moisture management and maximum breathability.

    Shred Shield helps reduce wear from toes.

    Virtually Seamless™ toe for enhanced comfort.

    Made in USA of Imported Yarns.

    Care: Machine wash warm inside out. Don't bleach, iron, or dry clean. Tumble dry on low. Click here to learn more about washing your wools.



  • Sock Height: Low Cut ( 5.7cm overall height).

    Cushion: Ultra Light Cushion is non-cushioned for maximum performance in close-fitting shoes.

    Fit: True to the sizes recommended in the size chart.

    Team Thoughts: I love these socks for running and they are very comfortable. These keep my feet from getting too hot or cold depending on the season.