The third generation of the iconic X-Series is now even smaller with much bigger sound, better battery and Jaybird's most secure fit ever. They're bringing full helmet compatibility and the MySound App experience to the X-Series for the first time. Weapons hot! No more complaints of too much or not enough bass. Now you can customize the way your X3’s sound and save those custom sound profiles to your buds, no matter what music device they’re paired with or what music service you use. It’s your playlist – you’re now in control. With double hydrophobic nano coating and redesigned super-tight seams we’ve got you covered in the rain, mud, sun, sweat, and tears – these buds will take a beating, and go wherever you go – and then some! They reduced the size and improved the fit. They have also redesigned the fins and went super-ergo for a solid, secure comfort fit – these buds are sticking with you no matter how crazy active you get.