Hermetic Bags having 5 layers. One of the layer is of EVOH which is the Gas Barrier Polymer. These bags do not allow gas exchange. Hence No Infestation, No Aroma Loss, Maintain Germination rate of Seeds etc.
Hermetic bags is a 5 layer bag with EVOH Polymer inside. These bags do not allow any gas exchange from Inside to Outside or Outside to Inside. It can retain the Aroma, No Infestation.