When selecting colors on the product page, if you are unsure of a color listed just leave the exact color/brand in the "additional requests" box.
Heather colors can be sublimated and bleached (products listed as $16)
Kavio colors can be sublimated (lighter the color the better. dark colors will not work)
Raglans can be sublimated.
Regular colors are vinyl/screens only. (products listed as $13)
oatmeal is great for sublimation