I was uncertain about swimming with music, but want something to break up the manonteny for those long days in the water. I just love it!! Why did these sooner! I had the ear impressions to make the bud which fit great! The sound quality is outstanding. I wear the MP3 on my cap and bluetooth music from my cell phone, some break up due to connection loss but nothing that isn't tolerable. Highly recommend this product for swimming enjoyment.