Available in: All in one: The waterproof, yet breathable outer fabric – polyurethane laminated polyester – is both soft and durable. Also, thanks to the flap-style soaker design, you can choose if you want to have the stay-dry micro polyester fleece or certified organic cotton next to your baby’s skin. Cover: The diaper cover consists of two layers; 100% organic cotton jersey on the outside for a comfortable feel and a polyurethane laminated polyester fabric on the inside to keeping the pants leakproof and lets air through to your baby’s skin.