Bigger pups = more liquid, it's simple math. Our dog diapers absorbent layers increase with the size of our diapers, because we know your Great Dane 'goes' more than your Chihuahua. Our waterproof outer shell makes sure the absorbed liquid doesn't seep through to your floors, furniture, or your lap. The absorbent pads are white in color so you can see when they need changed, and sewn in so there's no messing around with changing gross, soiled disposable pads. Just wash, woof, and repeat.