Quicksilver Messenger Service (sometimes credited as simply Quicksilver) is an American psychedelic rock band formed in 1965 in San Francisco. Their biggest hit, the single "Fresh Air" (from the album Just for Love), reached #49 in 1970. The band achieved 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. With their jazz and classical influences and a strong folk background, the band attempted to create an individual, innovative sound.
Member Dino Valenti drew heavily on musical influences he picked up during the folk revival of his formative musical years. The style he developed from these sources is evident in Quicksilver Messenger Service's swing rhythms and twanging guitar sounds. After many years, the band has attempted to reform despite the deaths of several members. Recently, original members Gary Duncan and David Freiberg have been touring as the Quicksilver Messenger Service, using various backing musicians.