If you are on a strict budget, you won't find better headphones than the Koss KSC75. Still, their headband-less design won't be to everyone's liking, even if they are comfortable to wear. The open design helps audio quality for you, but allows those nearby hear what you are listening to.
Surprisingly strong considering their price. Many reviewers are impressed with the detail and richness of the clip-on Koss KSC75 headphones, which hook individually over the backs of your ears rather than being attached to a headband. Bass is strong, though some feel higher frequencies suffer from lack of refinement. Sound will leak in and out, so these aren't a good choice for a library.ProsExcellent sound quality, Great value, Lifetime warrantyConsSound leakage, Detachable ear clips