As explained before, flexibility and lack of ANY restriction of movement whatsoever. Spandex provides that. And again, I dont see and never thought of Batman as wearing circus thighs. I guess its a matter of perception, but if he really does, then that only speaks for the functionality of that costume - just like the circus performers, his moves are completely uncompromised. Batman in comics moves very much like Spiderman (especially in Breyfogle's illustrations, the guys just like Spidey!), and just like him, he can be hurt but doesnt wear any protection because he relies on his physical movement and durability so it cant be compromised in any way
Its actually the movie suit that doesnt make sense when it comes to functionality. It weights a lot and slows down movement, not to mention that it greatly reduces the ability to move. And also, with a thick head mask, it dimms down the perception and hearing as well. The fact that the mask sticks out from the face also restraints eyesight. But so what? It looks stunning and fits the movie look and feel
Spandex allows very flexible and aerobic movements, impossible with body suit
I think they would with proper treatment. Dead End suit was ok, a big budget movie's top designer would make it look great and Adam West didnt look that awful either. And again, Im not saying Batman should wear the spandex suit in the movies, we already got used to the black armor approach and it works PERFECTly for the movies. All Im doing is simply defending Batman in general who came under fire in this thread as having "silly" costume overall in the comics which to me is outrageous