FunctionsCOMFORTABLE SECURITY: The new light and flexible ear hangers create a super-secure fit that's also very comfortable. SWEAT-RESISTANT: Designed as an essential sport earbud, Chops Flex makes the cut for your gym bag thanks to thoroughly IPX4 sweat-resistant construction. IN-LINE CONTROL: Whether multitasking on the yoga mat or hustling to the gym, the in-line mic and remote will let you control music and take calls with ease.