I used to wear earbuds, and the issues where my ears got sweaty, and they'd keep falling out were the ones that I thought these Koss earphones would be the answer for, and they are, but the true benefit comes from the fact that I can still hear what's around me while my music plays. If I'm riding a bike, or even just walking outside, now I can hear the cars and traffic around me, whereas before, I couldn't, which is ridiculously unsafe. Do yourself and others a favor and be safe out there. That aside, the sound quality is GREAT. Great treble sensitivity, great bass, great everything, and you'll be aware of your surroundings. I still own over the ear headphones at home that I had prior to these for intense listening sessions, but for literally any activity, these are perfect. Any time you want to be active with music, use these!

Just what i needed ,Thanks!

Good design, good battery life.

Put these in my ski helmet. Work great, quality sound for the price.

They work fine for me. The only thing is 1) they lose their cushions pretty quickly 2) they don't last me more than 3 or 4 months before one or the other channels getting wonky because of the connecting wire. The sound is fine for my audiobook listening. The KSC-35 has better sound but the clip pinches my ears