Targeted zones of light to moderate compression create anatomical fit, fight blisters, and stay put while active. Contoured nano-bamboo charcoal padding for added comfort. Cooling panels for temperature regulation.
Made for staying comfortable all-day and any activity with plush bamboo charcoal cushion in the heel and toe and ultra-thin Skin Thin™ cooling panels on the top. For the best fit, it is important to use the size chart before ordering.
Extra cushion in the heel and toe
Bamboo charcoal ionized fibers for durable softness
Ultra-thin top panel to regulate temperature and increase air flow
Included in all Socks with Purpose®
Micro-nylon treated with silver-ion technology to keep dry and prevent odor
Seamless construction and left/right design for 360-degree blister protection
Y-Gore heel to prevent the sock from slipping down into your shoe
Care Instructions: Wash gentle on cold. Tumble dry on low heat. No bleach or fabric softener.
Size
Average Shoe Size
S
US: M 4.5-6.5
US: W 5-7.5
UK: 2.5-5
EU: 35.5-28.5
M
US: M 7-10
US: W 8-11
UK: 6-9
EU: 39-43.5
L
US: M 10.5-13
US: W 11.5+
UK: 9.5-12.5
EU: 44-48
XL
US: M 13.5+
UK: 13+
EU: 49+
The AC4 Active Comfort Sock uses two of OS1st’s signature technologies for the ultimate comfort experience. The AC4® is built with nano-bamboo
OS1st AC4 Active Comfort Socks-Black-M
OS1st AC4 Active Comfort Socks, Re-define comfort with OS1st new #AC4ActiveComfort socks. 💙 Nano bamboo charcoal cushion 💙 Skin Thin designs for cooling effect 💙 Moisture wicking 💙
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Buy OS1st AC4 Blister Protection Double-tab Active Comfort Socks (White, Crew, Small) at