Fixed that for you.
There was nothing to "fix," given that what she's shown wearing it in the same exact scene that we first see Elendil's armor. And since she doesn't actually go into the battle herself, it seems pretty obvious that it's supposed to be more decorative than practical. Therefore thinner gilded cloth instead of quilted padding like the rest of the soldiers were wearing.
It's a bad complaint and people making it should feel bad.