Flying heroes don't need a cape for anything but aesthetic quality, such as with Superman. But you don't see Wonder Woman with a cape or how  about oh I don't know....THE ENTIRE GREEN LANTERN CORPS. Thousands of protectors all of them fly but hmmmm, I don't really remember any of them having capes. Why, because if the Incredibles taught us anything it's that capes are more trouble than they are worth.

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