Digipak

A digipak essentially consists of a plastic CD tray glued inside a folding cardboard cover. Though it once referred specifically to the patented digipak packaging, the term has since become a genericized trademark, generally refering to any cardboard based CD package.
Most digipak's will be designed to promote and create attention to the target audience, usually following a similar theme to the genre or common codes and conventions of the type of music being sold.