Best generic definition is nu-prog, which doesn't do them justice at all. Completely original and imaginative and unlike any of the crap pumped into the mainstream through MTV. Their two albums are about the death of the friend. Deloused in the Comatorium features the mystical journey of protagonist Cerpin Text. Their second album is in essence one track divided into suites, again about the death of their friend. Their lyrics are obscure and non-sensical yet deeply moving. Cedric Bixlar and Omar Rodriguez were previosuly members of At the Drive In. Other members are Flea and John Frusciante of Red Hot Chilli Peppers.
"Oh crap, i just came"
"just like that?"
"well i was listening to Mars Volta"
"what those two white guys with fros?"
"yeah, fuckin' aye"