FlipHook: Flexible two-way design allows you to wear the headphones either in-ear or behind-the-ear. Plus magnetic earbuds that allow for easy cable management when not in use.Never hurt. Never fall out.: Thanks to TwistLock and FlexSoft technologies, these headphones are lightweight and ergonomically built to ensure secure fit and stability no matter the workout.Sweatproof: Designed to endure and outlast your high intensity outdoor or indoor workout sessions in any weather conditions, thanks to the IPX5 rating.Hands-free calls: In-line one button remote with microphone enables hands-free calling, allowing you to focus on your workout. A long press of the button activates voice assistant support.JBL Pure Bass Sound: The 8.2mm dynamic driver of the JBL Endurance Run 2 delivers bold sound with rich bass to get the motivation your work out deserves.