Diaper

A diaper is a garment worn around the waist by human and humanoid infants. They are used mostly to contain excretions that the child does not yet have any control over.

In mainstream Smurfs media, Baby Smurf is the only known Smurf character that presently wears a diaper. In the EMPATH: The Luckiest Smurf story series, Empath's daughter Psycheliana would wear a diaper.