100% organic cotton, microwave-safe batting made in Maine!  Package contains one 36"x45" piece, perfect for bowl cozies, tortilla warmers, potato bags, casserole wrappers, corn steamers, and other microwave-cooking projects.  Use with 100% cotton prewashed fabric and 100% cotton thread.  IMPORTANT: Limit microwave time to two minute intervals - when longer cooking time is needed, stop, turn the item, then start again. Never leave a microwave unattended while cooking.