Tattoo Tees

Apply transfers to light-colored, 50/50 poly-cotton blend or 100% polyester. These transfers are not colorfast when applied to 100% cotton fabrics or blends with high cotton content.

And under "Good-to-Know" Stuff

If you are using a fabric other than 50/50 poly-cotton blend or 100% polyester, wash your test transfer to confirm that it is colorfast before continuing.