A romper suit is a one-piece garment that covers the torso and legs, typically worn by infants and toddlers. However, there are several other synonyms for the term that could be used interchangeably. For example, "onesie" is a brand name that has become a generic term used to describe a baby romper suit. Other words used to refer to the outfit include "bodysuit," "play suit," "babygrow," and "sleepsuit." Regardless of the name you prefer, a romper suit is a practical and essential piece of clothing for babies. From cozy fleece options for cold weather to lightweight cotton versions for warmer days, there is a romper suit to suit every baby's needs.