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Product Specifications


one pair

Item #


Style #


Item is returnable, but does not qualify for free returns.

OS1st AC4 Active Comfort No Show Socks

Slip into the ultimate comfort experience in the OS1st AC4 Active Comfort No Show Socks! Built with nano-bamboo charcoal cushion and Skin Thin™ cooling technology, these socks support every step during your activities. From exercise to everyday adventures, choose the OS1st AC4 Active Comfort No Show Socks!

  • Made with ultra-soft nylon treated with silver-ion technology for anti-bacterial odor and moisture wicking technology
  • Cushioned with Nano Bamboo Charcoal ionized fibers for durable softness
  • Skin Thin™ Technology increases air flow to keep you cool
  • Seamless construction reduces irritation and blisters
  • Left/right design for anatomical fit
  • Hang wash and hang dry only


Small: Fits Women's 4-6.5/Men's 4-6
Medium: Fits Women's 7-10/Men's 6.5-9.5
Large: Fits Women's 10.5+/Men's 10-12.5
Extra Large: Fits Men's 13-15

* U.S. Size Equivalent