Long sleeve undershirt made by Gilbert. Designed to cool the body using an ultra-breathable moisture wicking fabric. Mesh panels for added ventilation on key sweat zone areas. Fitted cut contours to the body. This garment delivers unique muscle compression and reduces muscle vibration allowing players to recover quikcer and get back into action faster. The compression results in increased blood flow venous return which delivers oxygen to the working muscles and more rapidly reduces lactic acid build up. Flat locked seams. 80% Nylon, 20% Spandex.