Popular Canadian travel brand Monos reveals its 'most ambitious category expansion yet' Monos is one of those brands that hit the scene and never seemed to slow down. I personally have had two of the carry-on suitcases since it launched in 2018, and can’t say enough good things about them. As someone who travels standby with a carry-on almost exclusively, having a compact and dependable bag you can stuff to the gills but still count on as an in-flight travel sidekick is a true necessity.