Esembly's Diaper Outer is step two of their two-step diapering system for an absorbent and blowout-proof diaper. This diaper cover is made of 100% upcycled polyester TPU (derived from recycled plastic bottles), making it completely waterproof and ready to catch any blowouts. Simply snap it over Esembly's Diaper Inner and the Diaper Outer will make sure any leaks are contained within the diaper. They even double as swim diapers - your little one will be pool-ready without the need for any additional purchases! Features: Made with OEKO-TEX and GRS-certified recycled fabric - 100% recycled plastic bottles, BPA-free and lead-free Two rows of snaps at the waist allow you to adjust the size of the waist independently from the openings at the legs, enabling you to get a perfect fit Available in two sizes: Size 1 fits babies approximately 7-17lbs; Size 2 fits babies from 18lbs until they're potty trained Choose from a wide variety of fun prints for your perfect look How many Esembly Outers do I need? Esembly's Diaper Outer can be reused a few times before going in the wash as long as they are not soiled. Considering you will be laundering 2-3 times a week, we recommend having 6 Outers. Swim diapers how-to! When your baby outgrows their Size 1 Esembly cloth diapers, hang onto a few Size 1 Outer diaper covers and use those as reusable swim diapers. The Size 1 Outers will give your toddler a nice snug swimmy fit. If you're planning to spend a full day at the beach, pool, or lake, bring multiple reusable swim diapers with you. This way, if one gets soiled, you have backup. Not sure where to start? Click here to find out about the benefits of cloth diapering and Esembly's diapering system!