Smartwool's PhD Run Light Elite Crew socks provide you with the extra protection from road and trail debris when compared to the Elite Low Cut. It's simple in its look, but not in its design. These socks are nearly bursting at the seams with the latest technology, like their Indestructawool technology that provides enhanced durability, a Virtually Seamless toe for enhanced comfort, a 4 Degree elite fit system for a dialed, performance-oriented fit, and more.