I Wear This Shirt… Periodically (white text) T-Shirt-Art

Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 65% Cotton, 35% Polyester, Imported, Machine wash cold with like colors, dry low heat, Funny, nerdy, but clever science joke involving the Periodic Table of Elements, Makes a great gift for science and chemistry lovers, as well as anyone who likes geek jokes, Lightweight, Classic fit, Double-needle sleeve and bottom hem