Personalized Neurofibromatosis Ribbon Youth T-Shirt. Neurofibromatosis Awareness Youth T-Shirt - Kelly Green with green ribbon for support. This product can be personalized with a name or date when you use our easy designer tool. 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.