Summary: Look around for another product. I figured I couldn't go wrong with Koss, but maybe it's been too long since I owned a pair of Koss headphones. Was terribly disappointed, but should have known better, given the price. Live and learn...
Pros: Lightweight; good name
Cons: These headphones have a tinny sound, poorly constructed jack, and are downright uncomfortable
Summary: I have the older version of these, and there about 6 years old now, and I only have two problems with them, one is the cord is a little too short, and the other is a small occasional rattle/clicking in the right speaker
Summary: Someone who uses headphones designed this one with everything that you need. Very rarely do I find a product that I like everything about it, but this is one. Sound quality, volume control in a handy place, compact design, behind the head design with the fold-up feature. I bought a second set before they stopped making them.