Why Are These Potty Training Pants FEARLESS? Because they are waterproof, and stuffable. It's that simple. These trainers make it safe for you to enter into the unknown world of potty training. How long will it take?? What could happen?? What kind of mess could be made?? What if my kid leaks everywhere?? What if we have to go to my snooty friend's house and my kid has an accident?? Waterproof trainers, baby. Car seat? Saved. Couch? Saved. AND they come with enough absorbency to hold half a pee - which means natural consequences for your child. Need more absorbency? Just stuff it. Purchase an additional Training Insert to boost this baby into a mini-diaper in a flash.