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 means the diaper is easy to access for diaper changes and can open like a flap when it's time to go potty. Conveniently, the pants do not need to be removed for diaper changes or potty trips--baby's legs stay snug and warm all day! These Chappy-Nappy pants are made of cozy undyed Merino Wool. The wool is a lightweight knit that will keep your little one warm in colder months but is still breathable enough for warmer days. Wool may be hung to dry between wears for up to four weeks without washing (if soiled or dirty, hand wash immediately). Hand wash in tepid water using wool wash. Add lanolin to help repel urine from the belt area. Lay flat to dry. Patent-pending.