Double Laminated Foil Bag 

This bags use for packaging some high moisture sensitive substances  ,such as Silane Crosslinkable compound .
and the structure very special :
The laminate foil bags with another PE bag inside 
White PE/ALU/PET/PE + PE Bag 

Remark :This bag can constructed with a degassing valve which helps exhausting the air and water vapour out of the bag.