100% Polyester. Structured Build Maintains Shape With a Slightly Higher Crown. Two-Colored Knit Mesh Fabrication&Back Panels Deliver Added Ventilation. Stretch Construction Provide a Comfortable Fit. Built-in HeatGear Sweatband Wicks Away Sweat to Keep You Cool&Dry. Embroidered UA Logo on Left Side. Comes in S/M and L/XL.