these earbud be great . I have be use they for about 3 week now and they have be super . pro : Stay in any ear -lrb- many earpiece available out of the box -rrb- comfortable long cord shirt clip attach to wire good high range sound great for mow , run etc. . very soundproof durable design come with carry case con : uncomfortable when try to lay down or fall asleep . low range sound be lackluster OVERALL : come from someone who be just look for a pair of headphone that would stay in they head , these m6-bk perform well . there be a bunch of different earbud attachment that will fit any depth or size of ear . another thing of note be the wiring near the earbud itself ; it be encase in a heavier material that can be mold to fit the back of you ear , which be nice . the only thing hold these back from five star be the sound quality .