Tracks HD are the first interchangeable on-ear headphones featuring V10 High-Definition Sound EngineTM speakers, switchable cables and nearly indestructible "Sound Track" headbands.SOL REPUBLIC engineers developed a proprietary new polymer called FlexTech,TM which makes them virtually indestructible. For total comfort, the team designed the Tracks HD ear cushions to be large and lightweight.The optimal balance of size, style, sound and comfortEngineered to be superior in sound, powered by the SOL REPUBLIC Sound Engine that is a private, personal speaker systemNearly indestructible, as every Sound Track band is made of FlexTechTM, our advanced polymer compoundEquipped with 3-button remote and microphoneTracks have extreme comfort because the ear cushion is large and lightweight so there is reduced pressure on the earTracks HD are available in black, grey and white and come with a carrying case.CompatibilityAudio works on all phones and audio players with a 3.5 mm jackMicrophone works on almost all Android & Blackberry PhonesMicrophone + 3-button remote control works on iPods, iPhones & iPads