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