Personalized Bookworm in Training Reading Gift American Made T-Shirts. Bookworm in training girls or boys book reading American Made T-Shirt - White 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.