Personalized Gray Ribbon Awareness Owl Youth T-Shirt. Gray Owl awareness ribbon Youth T-Shirt - White has room to personalize to show support for someone with hyperglycemia, diabetes, brain cancer or allergies. 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.