THE ATOM T-SHIRT, Atomic Science Nuclear Medicine Physics Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat The Atom T-Shirt - Science Class, Retro, Men's Clothes, Women's Clothing Tops, Teens, Nuclear Medicine Physics, Kids Clothes, Atomic Structure, Nucleus, Scientific Equations. Features prominent graphic image. The atom. It comprises everything, but our perception of it shifts with every new age. As we collectively traverse deeper into the new millennia, science will make us or break us - but it starts with the atom, and the amazing energy within. Lightweight, Classic fit, Double-needle sleeve and bottom hem