Personalized Mitochondrial Disease Support Train Youth T-Shirt. Mitochondrial Disease Support Train Youth T-Shirt - Kelly Green has green awareness ribbon. Add a personalized name for a custom support gift. 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.