Originally Posted by Llama_Shepherd
The rubber is the batsuits is not lightweight, they often weigh as much as the actors themselves, and get very, very hot. With the Batsuit, it's even harder to get right because, the thinner you have the material, the harder it is to dye grey/black because the foam goes and crumbles, so then you make it thicker and it's harder to manoeuvre in.
The current Batman suit is mostly to accommodate for Bale. It's made from the same material (also used in Tron: Legacy), and is only a bit lighter, but gets less hot.
Nite Owl's costume can't be compared entirely because they used a different dying technique because it's different colours.
There's a difference though. The plates being a separate piece means that they could use a bodysuit underneath, which is made from a mesh material that's breathable that's apparently in use by the military. An entirely rubber bodysuit won't be as breathable.