It’s the most breathable lightweight Double Layer sock and is designed for a minimal feel. Ideal as running socks, walking socks, or light hiking socks, the Wrightsock Coolmesh II Quarter Socks work to prevent blisters while remaining one of the most lightweight and breathable socks on the market. Wrightsock's are also made using recycled plastic bottles, each sock uses one bottle. So whether you are hiking a new mountain, running a new route, or walking through a new city, Coolmesh™ll socks will keep you dry and blister-free all day long.