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patented FS6® technology
a shaped-to-fit design for all foot types made with ultra-soft yet durable microfibre
1st Ray Technology promotes better forefoot mobility and gait efficiency
made for all-day comfort
Active Comfort Socks (AC4) - Lime Premium Leather patented FS6® technologyThe AC4 Active Comfort Sock uses two of OS1sts signature technologies for the ultimate comfort experience. The AC4 is built with nano bamboo charcoal cushion where it counts and OS1sts 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. For the best fit, it is important to use the size
