I love my Bose SoundSport ear buds. When I used it for the very first time on a treadmill, I felt as if the buds would drop out of the ears but they didn't. In fact, they held so comfortably and firmly in place. The only negative aspect is the buttons. I feel they are a little too hard to depress. I also feel there should have been a more comprehensive user manual. Otherwise, this is a great product to have. Enjoy the sound quality and toughness.