I'm really happy that you wrote "realistic" in a *** grano salis way.
Because realistic, with or without inverted comas, has absolutely NAWTHING to do with those loose blue pajamas he's wearing during the war.
Comic book characters are never realistic: at least not the Stan Lee & Jack Kirby inventions.
But the movies have discovered how to render their iconic costumes in a faithful and smart way (Iron Man and Spider Man in Raimi times); that's not the case of the two last attempts, that will bury comic book movies.
When X-Men were actually
men in black it was the other extreme: directors and team were too careless about the costumes, it was the
ah-ham 
"spirit" of the whole thing that was important to grasp.
Now, colourful Captain America has got such a pathetic loose design, such a poor mask (semi-helmet), that is quite embarassing.
You laugh at the recent Cap incarnations (and they are indeed laughable); people will laugh at the present monstrosity just like that.
Wait and see, Jak Jak.