Active Comfort Socks (AC4) - Pink Size:Extra Large maximizes air-flow achieving a cooling

maximizes air-flow achieving a cooling sensation to your feet

or in any shoe for extra mobility

Arch/heel pain

Our patent-pending Compression Zone Technology provides pain relief and prevention for those suffering from jumpers knee (patellar tendonitis)

OS1st calf sleeves are easier to move in compared heavier supports

Active Comfort Socks (AC4) - Pink Size:Extra Large maximizes air-flow achieving a coolingThe 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