Bullmastiff Owned By Adult Sweatshirt 80/20 cotton blend Image is printed directly onto the shirt using state of the art printers. We do not use heat transfers so there is nothing to peel or flake off. Resolution is photo quality and far better than any screen print. Printed area is very large (12 x 12 minimum size). Highest quality heavyweight 9 oz. 80/20 crewneck sweatshirt.