Items for sublimation need to have a polyester coating in order to accept sublimation inks. Uncoated items will not properly accept the inks and the images will not transfer.
JPPlus has full line of sublimation blanks specially designed to accept sublimation inks.
JPPlus has a team of sublimation experts available to help with any questions you may have. Contact Customer Service at firstname.lastname@example.org or at 800-869-7800 Monday through Friday 8am to 8pm CST and they can put you in contact with someone who can help!