How To Classify Science Funny Biology Chemistry Physics T 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 This shirt makes science, chemistry, biology, and physics easy for anyone to understand. It's a great tee for any nerd, geek, scientist, biologist, chemist, physicist, or science teacher who wants to explain science in simpler terms. Perfect for any trip to school, library, science lab, research lab, chemistry lab, coffee shop, or bookstore, the shirt can even be worn by girls and boys with a chemistry set or who enjoy science. It's a great shirt for everyday tasks such a studying, running, jogging, biking, cycling, working out, or late night cramming. Lightweight, Classic fit, Double-needle sleeve and bottom hem