OS1st Running Socks

OS1st AC4 Active Comfort No Show Socks

 in style BLACK

This lightweight, breathable sock will keep you cool and dry while offering protection from rubbing and slipping.

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Enhance your run with a pair of OS1st AC4 Active Comfort No Show Socks.

These no-show socks have target zones of light to medium compression to create an anatomical fit, fight blisters and stay put during your run. Plus, the seamless construction makes sure there are no irritations while you work out.

Your feet will stay dry and comfortable thanks to the ultra-soft nylon and NanoBamboo Charcoal ionized fiber cushion that wicks away moisture. There are also cooling panels and Skin Thin™ Technology that increases airflow and regulates your feet’s temperature.

Your feet will smell fresh after your run thanks to the silver-ion technology treatment that provides antibacterial odor control.

The OS1st AC4 Active Comfort No Show Socks will keep your feet happy throughout the day and during your runs.


OS1st Sock Size Women's Shoe Size (US) Men's Shoe Size (US)
Small 5-7.5 4.5-6.5
Medium 8-11 7-10
Large 11.5+ 10.5-13
XL - 13.5+


Hand wash and hang dry only with non-bleach detergent.

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Based on 1 Verified Reviews


Lorie T 1 year ago Verified Purchase

Great comfortable socks!