Sub Pop continue to innovate in the field of recorded music by releasing acclaimed works by Nirvana, The Postal Service and Sleater-Kinney on the exciting cassette format. Each cassette features two full sides of music, wrapped in a four-panel J-card sleeve and a sturdy plastic case, giving you the key features of the popular vinyl, compact disc and digital albums but in a unique format that users are calling "physical," "nifty" and "compatible with the sound system of a 1987 Toyota Corolla."