Spreadshirt Paleontologist in Training Kids' T-Shirt For your aspiring paleontologist. Designed and printed in the USA. This durable kids' t-shirt is made for non-stop play. Perfect for the playground, the classroom or for doing chores around the house (if you're lucky), this tee is sure to keep up with any kid. 100% preshrunk cotton (heather gray is 90% cotton, 10% polyester); Fabric weight: 6.1 oz (heavyweight). For best results and to maximize durability machine wash cold, inside out and tumble dry on low heat.