These earphones are for sports. They are made by design to allow you to hear your surroundings a little bit and the music. I think they sound great and are very comfortable. They stay in my ears great. All in all good buy.
This particular set of headphones was appealing to me particularly because of the styling. I've previously owned a pair of Beats by Dre Tour, the two main differences are that the Tours are noise isolating and have no other support for your ears outside of the buds themselves. As far as sound the powerbeats leave much to be desired. I wish that they had more bass and clarity. Overall I have to say that although they are very stylish I would say pass for this price. Not worth the 149.99 price tag.