Keep your feet moving all day long with this PhD Outdoor Light Crew. You don’t want to be hiking up Tooth of Time and have your feet screaming in pain because you are not wearing the right kind of socks. Throw these on at the beginning of every day and you won’t regret it for one minute.Features:Men’s4 Degree elite fit system uses two elastics for greater stretch and recovery to keep the sock in placeLight weightStrategically placed mesh ventilation zonesFlat knit toe seamFabric: 63% Merino wool, 34% nylon, 3% elastane Sizing (by US shoe size):S: Men’s: 3-5.5, Women’s 4-6.5M: Men’s: 6-8.5, Women’s 7-9.5L: Men’s 9-11.5, Women’s 10-12.5XL: Men’s 12-14.5Made in the USA