Comfort Sock uses two of OS1st’s signature technologies for the ultimate comfort experience. The AC4® is built with nano-bamboo charcoal cushion where it counts and OS1st’s cooling Skin Thin™ Technology for temperature regulation. Made for everything from exercise to everyday, this sock features blister protection, contoured padding, and light-to-moderate compression for support and fit.

Specs

Sizing Chart
Small: M3-5.5 | W4-6.5
Medium: M6-9.5 | W7-10.5
Large: M10-13 | W10.5 - PLUS
Xlarge: M13.5 PLUS

Return Policy

Sale items, electronics, and used/worn items are not eligible for returns or exchanges.

Please reference Return Policy

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OS1st AC4 Active Comfort Socks