Two double layered flaps are fastened together with ultra soft hook and loop fasteners. Once the two flaps are open, the baby's chest and belly are fully exposed for skin to skin connection. The elastic waistband allows for easy dressing and (as easy as they can get) diaper changes. These onsies were made for bonding! Visit their website here to add the color and size of your choice. The onsie pictured here is Mocha.