Hey! It's a new gray shirt and now has blue sleeves with plaid stripes instead of white sleeves. You can buy it in the Zip store and it is called in the original Gray Shirt.
How to install: If you have a modloader, then just drop the Gray Shirt with Blue folder into the modloader folder. If you do not have a modloader, then using the IMG editor, throw the shirtagrey.txd file from the Gray Shirt with Blue folder into the player.img IMG archive