Here's the diaper opened up so you can see the stay - dry microfleece inner lining and pocket, the two microfiber inserts that are included, and the strip of PUL at the front of the diaper which helps guard against leaks from tummy sleeping. (zephyrhillblog.com)
• An outer layer of breathable, waterproof polyurethane laminated polyester (PUL), sewn to a butter soft microfleece inner layer, so that only the softest of soft touches your baby's delicate skin. (myblossombottom.com)