The men’s PhD RUN ULTRA LIGHT Low Cut Socks feature Light Elite cushioning with targeted padding for runners. Light cushioning on the ball and heel of the foot add some extra softness where you need it most. Smartwool’s 4 Degree elite fit system ensures a snug yet comfortable feel. Durable Shred Shield technology improves the weave strength, maximizing the longevity of these running socks. The low-cut height balances protection and comfort.