Black UO Hats first surfaced on Chictopia's streetstyle gallery in Spring 2009 seen on San Luis Obispo blogger lindarrr. She wore her black UO straw hat with a black Push Button via Pixie Market mini virgin mary print dress and black H&M strappy sandal shoes. Since then, Black UO Hats have grown in popularity as bloggers from Toronto, Bellaire, and Los Angeles have discovered them. Black UO Hats are generally seen in bohemian, casual, and vintage style. Popular types of Black UO Hats are felt, straw, fedora, floppy hat, and sequin beret.
There are currently 20 streetstyle photos of bloggers wearing Black UO Hats. Most recently, blogger Speedbump styled her black UO sequin beret hat with a beige vintage beaded collar accessories, black vintage ethnic-y print vest, and brown Mike & Chris silk studded top.