Personalized Future School Librarian American Made T-Shirts. Cute future occupation gift says When I Grow Up I'm Gonna Be A School Librarian. Fun American Made T-Shirt - White for the future librarian. Enjoy the comfort and durability of this 100% cotton t-shirt Born in the U.S.A. 5.4 oz., pre-shrunk 100% cotton. Heather Grey is a cotton/poly blend. Double-needle stitching throughout. . Seamless collar. Shoulder-to-Shoulder taping. Made in America.