These cute shirts are a cotton shirt with vinyl print on them. They say Butt Wiggles Make Me Giggle on the front and our logo on the back. There are 4 dog butts on them 2 small 2 large but if you would like them customized to have a specific number or size of butts just let us know! We use the Gildan shirts and they have a nice variety of colors if you need a bigger size then what we have just let us know.