Underwear is something most of us wear daily, yet rarely think much about—especially the small details, like the tiny bow often found on the front of women’s underwear.

While many assume the bow is purely decorative, there’s speculation that it once served a functional purpose. A popular explanation on the internet suggests the bow’s origins date back to a time before elastic waistbands.

Before elastic became common in the 1900s, underwear was fastened using a ribbon threaded through eyelets at the top. This ribbon was tied into a bow at the front, making it easier to tighten or loosen. In dim lighting or when dressing quickly, the bow also helped indicate the front.

Though this theory makes sense, there’s little concrete evidence to fully support it. Historical records show that men in medieval times wore “braies,” loose-fitting drawers tied with a string or belt. However, men’s underwear no longer features bows, so the tradition didn’t continue there.

Women’s undergarments have evolved over the centuries. Before the 15th century, what women wore underneath is still debated due to limited preserved evidence. By the 1800s, drawers became common and increasingly decorative.

In France, the first “pair of underpants” appeared in the 19th century—baggy, split garments tied together with a drawstring. When elastic became standard, some speculate the bow remained as a decorative nod to history.

Alternatively, it might simply be a cute, feminine touch added by designers. Regardless of the reason, the bow has become a lasting and recognizable detail.