They did make real suits that Downey Jr. wore from time to time.
They're super heavy though (apparently the version they created for the first movie weighted at 85 pounds) so naturally it'd be more comfortable for the actors to wear the "light-weight" versions.
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TheCommandersamir
Sep 04, 2015 at 07:37PM EDT
cookiex
Sep 03, 2015 at 07:31PM EDT in reply to