Dear NASA Your Mama Joke Pluto Big Enough Shirt 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 Astronomers, astronauts, stargazers, and astrophysicists still bitter about Pluto being downgraded will appreciate the shirt that takes a shot at NASA, claiming NASA's mom clearly thought Pluto was big enough. The shirt is great for any man or woman who loves science, planets, the stars, science fiction, space travel, or the universe. The t-shirt is a great way to turn heads at college, university, the library, gym, planetarium, bookstore, coffee shop, or at science clubs meetings. It's also the perfect shirt to wear for nerds, geeks, gamers, and scientists to wear while reading, studying, gaming, cramming, or looking at the stars. Lightweight, Classic fit, Double-needle sleeve and bottom hem