Personalized 15th Anniversary Rockin and Rollin T-Shirt. Celebrate 15 Years Together with funny still rocking and rolling after 15 years T-Shirt - Purple. Makes a great gift idea for a 15th Anniversary Celebration. 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.