Some People Only Dream of Meeting Their Favorite Scientist 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 Science teachers who love their students can show their appreciation by wearing this tee. Perfect to wear to school, teachers' workshops, conventions, college, university, bookstore, and coffee shop, this shirt lets everyone know your favorite scientists are the ones studying in your classes. Wear your shirt while reading, writing, teaching, studying, grading, or tutoring your students studying biology, chemistry, earth science, ecology, or computer science. When you're not in your classroom, wear it while running, jogging, biking, cycling, working out, experimenting or studying. This premium t-shirt is made of lightweight fine jersey fabric Fit: Slim (consider ordering a larger size for a looser fit)