Would also have to agree with joe & Rodney, it would be a total gessing game and you`ll never realy find the answer to them all.
My supplyer i use i get new sealed T`s for a pound each, any size any colour, and i use 100% cotten ones.
I`ve never had any issues with them, and they have no label on them as they are factory made so ready to have your own lable put on if needed.