Personalized Histiocytosis Awareness Girl Youth T-Shirt. Histiocytosis Awareness and Support Youth T-Shirt - Vintage Green has girl with blue ribbon design. 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.