The AC4 Active Comfort Sock uses two of OS1sta??s signature technologies for the ultimate comfort experience. The AC4 is built with nano-bamboo charcoal cushion where it counts and OS1sta??s cooling Skin Thina??? 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 chart before ordering.

• Made with ultra-soft nylon treated with silver-ion technology for anti-bacterial odor and moisture wicking ability
• Cushioned with Nano Bamboo Charcoal ionized fibers for durable softness
• Skin Thin a??? Technology to increase air flow and temperature regulation
• Seamless construction
• Left/right design for anatomical fit
• Y-Gore heel
• Hand wash and hang dry only
• Do not wash with bleach or a product that contains bleach