What characteristic defines a 3-strand underbraid?

A 3-strand underbraid is specifically characterized by the crossing of the outside strands under the center strand. This technique gives the braid a distinct appearance, where it sits closer to the scalp, resulting in a flat braid that creates a smooth finish. The underbraiding technique not only allows for a more secure hold but also incorporates the hair in a manner that lays more neatly against the head.

The crossing of the outside strands under the center strand differentiates it from other braiding techniques, such as traditional overbraids, where the outside strands would cross over. This underbraid technique is often used in various hairstyles, including those that require a more snug and tidy look, making it a popular choice for both casual and formal styles. Understanding this foundational technique is crucial for anyone studying hairstyling, as it forms the basis for more advanced braiding styles and techniques.