Funny Space Science Pun T-shirt You Matter Astronaut 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 A funny Science shirt for the astronaut, scientist and astronomer or men, women and kids who love space. Lightweight, Classic fit, Double-needle sleeve and bottom hem