I have a few upgrade options available on my cloth diapers. One of the options is to add tuck flaps to the diaper cover. The tuck flaps cover the ends of the insert, and prevent leaking out the front and/or back of the diaper. Tuck flaps are $1 for the front flap and $2 for the back flap. The flaps are made from waterproof PUL material, and will match the inside color of the diaper.