Essembly is an organic diaper brand. I was very happy with these cloth diapers-super easy to use! Bundle comes with 2 Size 1 Outers and 4 Size 1 Inners. Outers are in EUC. Inners are in GUC. Outer - A waterproof cloth diaper cover that layers over our absorbent Inner to make a blowout-proof diaper. Can also be used on its own as a reusable swim diaper. Inner - A soft, trim-fitting and absorbent cloth diaper Inner. Pair this organic cotton fitted diaper with our waterproof Outer to make a truly blowout-proof diaper.