Personalized Neurofibromatosis Suppport (bear) Youth T-Shirt. Neurofibromatosis Support green ribbon bear Youth T-Shirt - Kelly Green for awareness events. 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.