Super Undies wants to help you succeed with your child's potty training. Our Pull-On Undies are designed to be a highly functional training solution, without the childishness of a "diaper." These sleek, sophisticated pants are waterproof, and have wonderfully stretchy sides for a great fit. The sewn-in absorbent core is three layers of microterry (four layers in size large.) This pull on style has no quick release snaps in back to keep them more true to the style of real underwear.