Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Big Giant Headphones

These are passive noise reduction headphones, so they are big and bulky. They appear well made. The noise reduction is very good. If I'm listening to music, I basically can't hear what is going on around me if it isn't very loud. This is the effect I was looking for, to be able to tune out the world around me.I also have the Koss QZ-5 headphones and I find they are lighter and fit tighter around the head. They are also less likely to fall off. However, the QZ-5 have the metal strap at the back, so it is impossible to rest my head on something while I use the headphones.Given a choice between the two, if resting one's head is a requirement, then I would suggest that the QZ-99 is a better choice. If not, the QZ-5 is a better choice for that reason. Both work equally well.