Sony MDR-AS400EX Active Series Sport Headphones, 9mm Driver, Pink Adjustable Ear Loop, which will fit everyone's ear. Drip-proof - tough for sweat and splash. 400kj/m3 highly magnetic Nd-YAG magnet for clear high-mid tone and powerful bass.400kj/m3 highly magnetic Nd-YAG magnet for clear high-mid tone and powerful bass. Tangle-free cable.