SOLO was a Cologne, Germany-based skateboard magazine created by the team behind the now-defunct "Monster" magazine, which was cancelled by Factory Media. The magazine's website went live, and its first print edition launched at the SSZ Sued gallery in Cologne and then at HVW8 gallery in Berlin. SOLO was published in German, with an English translation available, and subscriptions were planned for release. The magazine also maintained a presence on Facebook, Instagram, and Tumblr before it shut down in the fall of 2024. Several of the former staff members later went on to launch "Bubble Skate Mag" in late 2024.