The third generation of the iconic X-Series is even smaller with much bigger sound, better battery and extremely secure-fit. Weapons hot! With double hydrophobic nano coating and redesigned super-tight seams JayBird has 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! JayBird reduced the size and improved the fit. The fins were redesigned and went super-ergo for a solid secure comfort fit - these buds are sticking with you no matter how crazy active you get.