RBX.lua.Shirt (Object)
From Legacy Roblox Wiki
go to the catolog. then click on shirts. then type in what you want. then if a shirt pops up that you like click on the picture. now you click on buy this shirt. make sure you have enough robux/tix with you :D now click buy now click change character. now you have officialy bought a shirt. now you are going to click wear on the shirt you want. thanks bye :D