This is a good earphone, I would expect nothing less from Denon.
BUT there are some big cons. I buy innerear headphones because you CANT match the sound quality and they stay in the ear pretty well (for me) during exercise. BUT these headphones, while they are extremely comfortable, tend to slip out of the ear when I get sweaty and the sound deteriorates to that of a normal earbud headphone.
That my 2cents. Not a great headphone for exercising with if you really exercise hard like me but they are very comfortable and have soft flexible material rather than harder padded plastic that makes up the innerear seal.
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