leather cap

A leather cap is a close-fitting hat made of leather, typically with a short brim or visor.

The style evokes working-class or utilitarian dress from earlier eras—newsboys, drivers, laborers.

In gay subculture, a leather cap signals membership in the leather scene, often worn with other leather gear to communicate interest in BDSM or kink: He showed up in full leather—cap, vest, boots.