Using the same innovative technology as the Cardas Clear speaker cables, the Cardas Clear Upgrade Cable for the Sennheiser HD800 Headphone Cable brings Clear's unsurpassed clarity and transparency to some of the world's best headphones. With a separate cord for each ear built with matched propagation conductors, this cable functions like a pair of small, brilliant speaker cables. The two parallel cables have a black & white fabric braid over an Alcryn jacket, and are kept together with several anodized aluminum joiners, with a custom machined Delron splitter. Your Senneheiser HD800s will never sound better. 100% money back guaranteed!