Selected international designers, illustrators and artists were invited to submit designs for this one inch (25mm) button badge series. Stereohype sells B.I.O. (By Invitation Only) Series 15 badges separately and gives them away as a free surprise badge with selected Stereohype T-shirts. B.I.O. Series 15 includes artworks by CHK Design, Daniel Freytag, FL@33, Fred Deakin, Gavin Lucas, Jan Buchczik, Juste Halavin, Lynn Chen, Nemanja Jehlicka, Nick Bell, Nottene, Pierre-Paul Pariseau, Serial Cut and Studio Chehade. Released: November 2015