Personalized Gray Awareness Ribbon Youth T-Shirt. Gray Awareness Ribbon Youth T-Shirt - White you can personalize to show support for those with allergies, asthma, brain cancer, diabetes, hyperglycemia. 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.