Personalized Hold Your Horses in White T-Shirt. Hold Your Horses in White T-Shirt - White. For the horse lover or anyone who wants to tell the world to just dial it down a bit! 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.