... , there is an aluminum layer laminated, which is a very good barrier to resist moisture, oil, oxygen, ... made of PET film, which has a good barrier, so it can keep coffee fresh and prolong the ... flavor.5. The food packaging bags can be plain, or printed with pthe customized designs and logos according ... 3kg etc…8. The bag style can be three-side sealed, stand up with recloseable zipper, side gusset, quad ...