Skin not displaying correctly

What's wrong with it?

Did you read the description Ender Dragon?

It says the jacket and pants wont display in game.

You have to enable them in the Skin Customations setting.

They are enabled :|

The reason this is happening is that the way the jacket layer is rendered in-game is very weird and AFAIK not officially documented.
I've researched it and discussed my results here.

If you compare that "helm map" (or jacket map, or whatever) to your skin file, you'll notice that the green (body), red (right leg), and blue (left leg) areas have no transparent pixels, while the three others (head, 2 arms) do have them. That's why the jacket layer shows up on your Head & Shoulders™, but not on your body or legs.

To fix it, you'll have to place at least one transparent pixel in each of those boxes, but it's best to make everything transparent apart from the actual parts used as skin.

Thanks jomo, that was very helpful!