I print neoprene visors all the time with plastisol with out any dramas, i turn my dryer down a little and they go thru fine, havn't burt one yet.
If your koozies are already made that may pose a problem?
I would print them unassembled if you can.
If your koozies are already made that may pose a problem?
I would print them unassembled if you can.