Anatomically engineered pads for foot protection to absorb impact while preventing blisters and irritation. Multi-spot design is crafted to allow you to run, walk and play longer.Nylon covered LYCRA® provides contoured aerodynamic glove-like fit.THOR•WICK®COOL fiber in the ball and heel pads provides enhanced moisture management.Mesh Polyester for maximum breathability for an ultra-lightweight sock.Fiber content: 81% THOR•WICK® COOL polyester, 18% nylon, 1% elastic.Made in the USA.