Now you can proudly wear the insignia of the National Aeronautics and Space Administration thanks to the NASA Logo short sleeve Gray T-Shirt. With over fifty years devoted to the civilian space program and aerospace and aeronautics research, it's no wonder that NASA shirts are in such high demand! 90% Cotton 10% Polyester. This tee features a smaller NASA retro logo on the front breast and a large NASA graphic logo on the back of the shirt. The short sleeve top is tagless for a comfortable wear. All care instruction and trademark information is printed on the inside collar.