The Coolmesh™ll is their #1 selling sock worldwide! 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. The Coolmesh™ll are great travel socks that dry quickly and are ready for use the next morning. 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.