These Potty Patty / Potty Scotty Night Time Potty Training Pants have waterproof fabric on the outside and extra absorbent padding on the inside. These pants are waterproof and extra absorbent and will contain the accidents better; however, they will still feel wet, so your child will know that he/she has wet underwear. The outer shell is a very soft waterproof fabric; it is not vinyl or plastic - it is fabric, so it feels very nice to touch; the inside is lined with a layer of a very soft and a bsorbent terry fabric. -Has two sets of snaps, so they are adjustable to fit as needed. -Ideal for nap time and night time potty training. Available in the Following Sizes: -XSmall (19-24 lbs). -Small (23-28 lbs). -Medium (29-34 lbs). -Large (34-39 l bs). -XLarge (39-44 lbs). -XXLarge (44-49 lbs)