Panoware Men's Funny Science Geek Nerd T-Shirt | Element of Surprise Periodic Table 100% combed ringspun cotton Made in USA and Imported Fabric is soft, comfortable, and lightweight Wash before wearing, machine wash cold, tumble dry low, do not iron Please view our size chart under the main product image Our t-shirts have a more fitted style, so order a size larger if you're between sizes Designed and printed in the USA by Panoware Clothing Co.