The Logitech Dialog 220 headphones are very lightweight and comfortable on your head and neck and there is foam padding on the earpieces. Also there is a built in volume adjuster and a switch to change from mono to stereo. You can also extend the height of them but that is where the headphones are most fragile and liable to breaking apart
Whilst all those features may be good. The build quality on these is a bit bellow par. I know i cant make to many negative comments as these headphones are only £3, but there are somethings that bug me.
The sound quality is not the greatest due to a very low amount of bass but for a couple of quid you can listen to music and watch a movie fine with them
The 3m long cable. Now this can go both ways some of you may prefer a longer cable for the TV to sofa distances. But these are not a good choice for the MP3 player as you will have your pockets full with the 2 meters of unneeded cable
Overall these are good lightweight comfortable headphones for £3 but only use them for the TV to sofa. As there is simply too much cable to make them functional for an MP3 player