These socks have all the features you need to work, sweat, rest, and repeat--because you've got better things to do than remembering to pack an extra pair. features Designed for: Run, train Performaheel™M: 3D knit PerformaHeel™M provides micro-cushioning and creates a shaped fit that stays put Ergotoes™M: Foot-specific design Shine-bright: Reflective detail helps keep you visible in low light Seamless construction