O/S unisex Mountain Hardware convertible military hat

Unzip the top to leave just a visor in this army / military / cadet style hat. Nice idea, just less so given to someone losing their hair…! All materials tags are gone but it’s synthetic for sure, super super-lightweight and fast drying. Colour is a sort of pale dessert khaki, not ax yellow as the first image, a little deeper than the rest. I imagine it’s O\S as it’s highly adjustable - set at its smallest 22” head circumference in the pictures, with space to let out another 3”. So fits 22-25”.