Theory Vests first surfaced on Chictopia's streetstyle gallery in Summer 2008 seen on San Francisco blogger Serafin. She wore her blue Theory second-hand vest with a gray Topshop frilly dress, yellow vintage from the 70's bag, and gray UO oxford cut-outs shoes. Since then, Theory Vests have grown in popularity as bloggers from San Francisco, Santa Barbara, and Boston have discovered them. Theory Vests are generally seen in casual, urban, and business casual style. Popular types of Theory Vests are second-hand, sleeveless, puffer, and fringed. Blogger's favorite colors are black, blue, and navy.
There are currently 13 streetstyle photos of bloggers wearing Theory Vests. Most recently, blogger riamichelle of riamichelle.com wore her navy Theory sleeveless vest with a white Express skater dress and crimson L.A.M.B heels.