The AC4® Active 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. For the best fit, it is important to use the size chart before ordering.

Performance Features:

• Made with ultra-soft nylon treated with silver-ion technology for anti-bacterial odour and moisture wicking ability
• Cushioned with nano bamboo charcoal ionised fibres for durable softness
• Skin Thin™ 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

Comes with one (1) pair of socks per package.

Fit & Care:

• Fits true to size• To keep your footwear looking its best, wipe clean with a soft damp cloth and allow to air dry away from direct heat or sunlight