The basis for the tricorne hat was mostly practical at first, then it became a fashion statement. Its turned-up brim helped shed rain away from the face and also made the hat easier to wear with the large wigs popular in the 17th and 18th centuries.

Why it existed

  • Weather protection: The brim could be cocked up to keep rain from running into the wearer’s eyes or down the neck.
  • Wig compatibility: Men’s wigs got bigger, so the hat style evolved to sit more neatly with them.
  • Military use: Soldiers and sailors adopted it because the shaped brim was convenient in active, outdoor conditions.
  • Status and style: By the 18th century, it was also a fashionable sign of gentility and rank.

In plain terms

The tricorne wasn’t invented for one single reason. It started as a useful way to manage rain and movement, then turned into a popular style that also signaled class and fashion.

TL;DR

The tricorne hat’s “reason” was a mix of practicality and fashion: keep weather off the face, work better with wigs, and look stylish in the 18th century.