These are a delicious dried fruit that happen to be unsweetened and unsulfured.
Trader Joe's sells this item as do other stores.
The flavor and quality seem to vary during certain months but all in all it is a great product for cooking and snacking.
New Taste Thinking:
The best way to enjoy the pineapple rings is to put them into the refrigerator overnight. When you go to eat them the next day they will be crunchy, sweet and chewy. I also use the rings in a couple of my favorite desserts: Jamaican Pudding and Pineapple Bars.