Boys' tight-fitting T-shirt with HeatGear® technology for maximum support during performance. This is the first layer for activities where you will take advantage of the cooling properties of the material. Whether it's intensive training, running, golf or hockey.HeatGear fabric is extremely soft and smooth, providing extra comfort at a very low weight4-Way Stretch technology allows for better movement in every directionthe material wicks away sweat and dries very quicklyCut design for more coverageraglan sleeves for unrestricted movementMesh panels increase the breathability of the material