Personalized Biochemistry Cake Women's V-Neck T-Shirt. Biochemistry is a piece of cake, unchewable, insoluble cake text with a slices of cake is a funny gift design for back to school. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit