Use Printable Fabric Heat Transfer for any cotton fabric surface. This material has a soft fabric surface, so it won't crack when washed.

Print an image and cut out around the contour using the Silhouette cutting machine's Print & Cut feature. You can then iron your custom image onto a fabric surface, such as a t-shirt.

This material remains solid when ironed and so is suitable for all colors of fabric.

Videos:

How to Print & Cut (FAQ/videos)