Bi-color athletic T-shirts. 2color t-shirts are designed to keep you cool while you play sports. With a mesh side and underarm construction, your body is allowed to breathe while you are exerting yourself on the field of play. The 2color scheme adds style to the function of the mesh side construction. There are 6 colors currently (royal blue, red, green, black, navy blue, maroon) to match most popular team colors, or to emphasize the dominance of your own team.