When you are training for long runs, you need a pair of Smartwool Athlete Edition Run Print Crew Socks that are built to handle the high miles. These socks feature a 4 Degree elite fit system that offers a performance-oriented fit. They also have mesh zones for extra ventilation and breathability, Indestructawool technology for extreme durability and a virtually seamless toe for additional comfort. Merino wool offers natural odor control, moisture-wicking and temperature regulation to enhance your performance and keep you going for the long haul.