Flex Xtreme Wireless EarphonesHyperGear Flex Xtreme Wireless Earphones Whether you're casually walking or sprinting to the finish line, the Flex Xtreme delivers the immersive HD sound you need to shatter your physical limits. It features a built in microphone, intuitive onboard controls, magnetic earbuds, and a lightweight Memory Flex neckband that molds to your body and holds its shape for a comfortable, customized fit. Take your workout intensity to new levels with the Flex