Woozik A900 earbuds wont gent tangled in your backpack! Our silky wire design prevents the chords from knotting, and then eventually breaking, a simple solution to a very annoying problem. Enjoy full listening comfort with A900's soft, snug earbuds that conform instantly to your ears. Our ergonomic design enables clear conversation, with a comfortable fit and marvelous tone quality. These headphones deliver noise isolated, precise, Bass reproduction without heavy or weighty tones. Three pairs of included, ultra-soft earbuds (small, medium, large) ensure a perfect fit for every ear.