Match My Fly -Boys T-Shirt (variety colors) Our heathers t-shirts are made from a 60% cotton / 40% polyester blend and are available in five different sizes. All heathers t-shirts are machine washable. Made with an ultra-durable combination of cotton and polyester, our t-shirts are built to last, even after multiple machine washes. Designed in five sizes, these t-shirts are sure to fit any boy in the family.