I call this the "Fuzzy" green shirt because it just looks...fuzzy. I'm not sure if it really is fuzzy, but it might be some type of velour or something.
Here's Mal's fuzzy green shirt.
More pictures after the break...
The above is from Ariel...but more on that later.
From Out of Gas:
More from Ariel:
Heart of Gold:
Mal wears this shirt with his Browncoat.
My Photobucket Album for Mal.
Serenifly Costumes site for Mal.