Liquid K2, a kind of synthetic cannabis that causes erratic conduct when smoked, is currently being smuggled to inmates in the mail, sprayed on letters and pages of guides. This form of K2 is much more challenging to detect than common leafy K2 products which look far more like marijuana. https://www.tumblr.com/factsabouteverythingseo/748651429729812480/strongest-k2-spray-on-paper-strongest-k2-spray?source=share