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 weight 4-Way Stretch technology allows for better movement in every direction the material wicks away sweat and dries very quickly Cut design for more coverage raglan sleeves for unrestricted movement Mesh panels increase the breathability of the material