Chappy-Nappy crotchless pants are intended for potty learning. They are compatible with all of our Flappy-Nappies® diaper products (sold separately), which snap onto the waist of the pants. This design keeps the diaper accessible for effortless diaper changes and allows the diaper to open from the pants like a flap when it's time to go potty. The pants do not need to be removed for diaper changes or potty trips--baby's legs stay snug and warm all day! Lightweight fleece options will keep your little one warm in colder months but are still breathable enough for warmer days. Choose Pink Heather, Candy Apple Red, Caribbean Blue, Wild Indigo, or Evergreen. Medium-weight fleece options will keep your little one toasty warm all winter long. Choose Royal Blue or Latte Cream. Patent-pending.