Duh Periodic Element Obviousium T ShirtMachine wash cold with like colors, dry low heat Make your friends laugh with this humor shirt. Give a fun tee gift to your brother or sister for their birthday or a holiday. Attitude tops are fun to wear to parties and events. This chemistry themed shirt will be great for the college student in your life. Going back to school will be more fun when you wear this t shirt. Lightweight, Classic fit, Double needle sleeve and bottom hem We use high quality