Summary: I have small ears and i'm a 'lady' so was concerned that they would not fit, even though they say adjustable. They fit just fine, excellent sound quality as well. You feel like you're in your own world when wearing them. Good for a multitude of gym work - running, stretching...touch your toes and they don't fall off. Make sure you take time to adjust them properly when you get them so you don't have to fiddle a lot.
Summary: These earphones are great if you find that others aren't staying in your ears, keep falling out, aren't secure, etc. Especially for sports, these are very secure. Also, you can adjust them to exactly fit around your ear for extra comfort. Best earphones I've ever bought!
Summary: Brought for the gym, fit badly over the ears, sound is OK in the dry, I have Bose Qc3's as my day to day headphones. However They fall out when It gets warm and dont have any bass. Wouldn't buy again.