I purchased these at a discount and I was a little off put at first at the size of these earbuds, I thought they were way to big and that there was no way they would stay in my ears. I quickly realized I was wrong these earbuds have a rubber loop on them that sits inside the ear to hold the earbud in place, I exercised with these and they didn't budge at all. The sound quality was fantastic and these were a lot louder than other earbuds I've tried. Overall I thought these were great and I would recommend these to anyone looking for new earbuds.