Belly bands are used to enclose all of your invitation contents within the envelope. It's a decorative strip of paper, most of the time with your monogram or names printed on the front, bound around the invite and accessory cards by a little glue dot or strip of double sided adhesive in the back. Not only does it look beautiful, but it also doubles as a simple way to keep all of those little cards safe, sound and together inside. See below.... love it, right!?!