Personalized T-Rx Youth T-Shirt. A cute green T-Rex dinosaur wearing a lab coat and stethoscope handing out prescriptions. Otherwise known as a T-Rx. Adorable gift for any medical professional who loves dinosaurs. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.