This shirt celebrates America’s “X-Planes” and the progression of super-sonic flight. Feature's include top and front views of several of the first sound barrier breaking aircraft. Aircraft featured are the Bell X-1, Bell X-1A, Douglas D558-I Skystreak and Skyrocket, Convair XF-92A, Bell X-5, and Douglas X-3 and X-15. Shirt is a Medium Blue, 100% pre-shrunk cotton.