Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent purchase

I bought these earphones because I travel a decent bit and also for office use (to help block out background noise). I have been really impressed at how effective they are. I would say that they easily block out 95-97% of the noise around you and that is while listening to your music at low levels! I love the fact that I can now listen to my music and hear it very clearly with all those details I was missing before without having to ruin my hearing by jacking up the volume.The only complaint that I might have about them is that I tried out all the ear bud fittings that came with them and found the pair that fit my ears. That set of fittings still sometimes make my ears a bit sore. Don't know why but...it's a small side effect.