Outfit your little boy in this matching sharks rashguard and swim diaper set. The swim shirt is sized 18 months with 3/4 length sleeves so your baby won't be hot but still protected from the sun's harmful rays. The swim diaper fits newborn to up to 3 years old. The diaper has three adjustment settings that make the diaper last longer than a few months. Since the diaper snaps like a regular diaper, you don't have the mess down your baby's legs if there is a dirty diaper. Make sure to dump solids in the toilet, make sure your baby is clean, and put on a fresh swim diaper. All fabric is super soft on baby's skin so you don't need to worry about chaffing or rubbing. The fold over elastic on the diaper is easy on baby's skin but also keeps the diaper tight all the way around the waist and the legs to keep solids contained while swimming. The snaps in the front gather the fabric for a tighter fit around the bottom, move the snaps down as your toddler grows taller. Looking for an out of the box birthday or shower gift? Combine this infant swimsuit diaper and sun shirt with mommy and me swim lessons that teach lifeskills and water safety to mom and baby.