Occupy Mars T-shirt Terraform Shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 58% Cotton, 42% Polyester Imported Machine wash cold with like colors, dry low heat Who will win the Race in Space to Mars? Mission to Mars to inhabit and terraform the planet. The Solar System is our target and X marks the spot. Perfect for kids the junior astronaut, astronomer, teachers and scientists. Great for fans of astronomy, rockets, rocketry, model rockets, and the search for aliens or alien life. This premium t-shirt is made of lightweight fine jersey fabric Fit: Slim (consider ordering a larger size for a looser fit)