Here's a fun video showing you how to use Siser's Easy Subli. It's a printable vinyl that is used in conjunction with a sublimation printer to make beautiful designs. Why would you need it? Want to print a multi colored design on a dark colored or cotton shirt? This can't happen with the normal sublimation process. Normal Sublimation requires a light colored, Polyester fabric. The more polyester, the brighter your image will appear!