Board Thread:General Discussion/@comment-27059060-20151009165652/@comment-27059060-20151010083711

I get it from this wikia Batman article. It said that " Sometime after Arkham Origins, Batman's suit was upgraded with a darker grey texture and a new gold belt he would later use in the future installments. Batman modified the cowl with longer ears and a slimmer shape unlike the short eared cowl he used in Arkham Origins. (new skin in Arkham Knight)".