[rossdavidh]

1) you're going to wash it, which will take care of most issues that could possibly occur 2) the factory where the new stuff was made could also have left some chemical residue on there, and that could be gone by the time you get used stuff. I don't say this because I think either scenario is likely, but because you can use it to calm your inner paranoid-parent-voice (which most parents have, btw). Used clothes have finished outgassing all the weird chemicals from the factory where they were made.