Quicksilver Messenger Service (sometimes credited as simply Quicksilver) is an American psychedelic rock band formed in 1965 in San Francisco. They were most famous for their biggest hit, the single "Fresh Air" (from the album Just for Love), which reached #49 in 1970. Quicksilver Messenger Service gained wide popularity in the San Francisco Bay Area and through their recordings, with psychedelic rock enthusiasts around the globe, and several of their albums ranked in the Top 30 of the Billboard Pop charts. Though not as commercially successful as contemporaries Jefferson Airplane and The Grateful Dead, Quicksilver was integral to the beginnings of their genre.