I purchase these headphone because they be recommend for people with small ear . I must say that these headphone do not fall off\/out of you ear . I run several 20 mile run without they ever fall out of place . the problem be that the headphone stop work after 3 week of use . the problem seem to be with the wire ; if the wire move at all -lrb- even the slightest bit -rrb- , the volume in one earphone go in and out , make it unbearable to run with they . this problem happen 3.5 mile into a 21 mile trail run , so obviously I be more than a little frustrated with the product . I have try several other pair of headphone to ensure that the problem be not my mp3 player , and the other pair work fine . in summary , the fit be perfect , the quality of construction \/ durability be terrible .