Personalized If History Repeats Itself I'm So Getting A Dinosaur T-Shirt. For those who know history is bound to repeat itself, why not take it to the next level and get a dinosaur? This funny design combines historical humor with a dash of prehistoric imagination. Ideal for dinosaur fans and history nerds alike, it's a playful way to embrace the idea of going back in time-way back! 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.