I love that these are called “dad caps”.  Grab one for only $12 (reg $30) + free shipping and returns! (commissioned links)

Shop here — https://shopstyle.it/l/4xWD
You can also grab this Herschel cap for $10 (reg $20) shipped! —https://shopstyle.it/l/4xWF
Or this one for $15 (reg $30) shipped! — https://shopstyle.it/l/4xWG