The cloth diaper, which absorbs the wee, is placed inside the leak-proof diaper cover. Put in an extra insert if your child wees a lot. Place the child on the cloth diaper and adjust the Velcro fastening for a perfect fit. Make sure the diaper is completely inside the cover. Do not pull on the leg cuffs as this could cause leakage. It is a good idea to use a flushable liner to make it easier to dispose of poop.