PUL on Organic Cloth Diaper

I just bought many organic cloth diapers. It has a tag that states: Outer 100% polyester, Inner 100% organic cotton. However, now I know that PUL is considered not safe for babies. I wonder how it is transferred to the baby. I mean, is it by outgassing? They don't smell bad and besides, for maximum absorbency they recommend to wash them 5 times prior to use. Is it by leaching?