This is my second pair as I lost the first one. Much better design than the first Ironman with a battery on a cable next to the controls. So actually my 3rd, because I broke it. The earbuds fit perfectly in my bum and stay in place even when jumping. The sound is completely sufficient for training. I didn't even open my Bose plugs because they looked too big and for the $100 on sale I can't justify that against the $20. I sent the Bose back. My only real complaint is that the cables are a bit stiff, causing them to dangle too much. I wish they were softer or thinner.
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