Personalized Marching Band Grandma Cheer Grandkids T-Shirt. Band Grandma I'm here to cheer my grandkids fun marching band season support T-Shirt - White is great to wear to a football game or band competition. 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.