The Rikki Wrap has generous room in it to fit over any fitted cloth diaper. It works well with the Sandy's and One-size fitted. The material is waterproof with Mother-Ease's signature covered stitching around the leg and tummy areas. Mother-Ease does waterproof better than anyone else with an insanely durable water repellent that lasts wash after wash. They have a hook and loop closure, and are available in sizes Extra-small to Extra-large in a variety of cute prints.