I thought these would be great for while I go for runs. They are behind the ear so I thought they'd be less likely to fall out... they still do. Granted, not as much as normal earbuds but they still do. And if you sweat, it gets inside your ear and ugh, it's so gross. The actual plastic part those goes behind your ear comes apart from the bud, so be careful after you use them and take them off! Also, the protective plastic pink part... I've lost about 5 of them after running at night. You take the buds out and the plastic part comes off and falls to the ground and you don't realize it until the next time you try to run.