Personalized PIDD Awareness Youth T-Shirt. Pretty blue bird with blue ribbon to show support for PIDD Primary immunodeficiency diseases comes on a Youth T-Shirt - Kelly Green. 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.