Xact undershirt wicks moisture from skin and circulates body heat. Silicon rubberized grip pattern on sleeves. This Gilbert Xact undershirt has moisture management and muscle compression. Shirt is cut to fit tightly to the body to reduce muscle vibration, a key factor in energy loss and tissue damage. The garment keeps the muscles compact during activity by acting as a second skin. This speeds up recovery time after a hard training session or tough game. The shirt is designed to maximize contact with the body, allowing sweat to evaporate faster dispersing it over a large area. Double sided fabric, for optimum thermal protection. 77% Nylon, 16% Polyester, 7% Spandex. Sizes: Youth Large-2XL.