Extra inserts may be used to replace wet inserts inside Smart BottomsLilTrainers, If your child only has a small accident remove the wet insert and replace with a dry one, Two inserts come in a package, Inserts snap in to Smart BottomsLil Trainers, 4layers of organic cotton, Snaps in to the Lil Trainer, Available in 2 sizes, SKU: SMTB030