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 13 badges separately and gives them away as a free surprise badge with selected Stereohype T-shirts. B.I.O. Series 13 includes artworks by Autobahn, Bond & Coyne, Brett Ryder, FL@33, Lunartik, Marcus Leis Allion, Mark Adams, Nick Foot, Sneaky Raccoon, Timothy Hunt, Whitney Sherman and Will Scobie. Released: November 2013