Personalized Marching Band Sport T-Shirt. Marching Band, the sport for intelligent people. It takes more than physical strength and fitness to be in marching band. It takes intelligence! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.