THESE ARE MADE OUT OF EITHER TWO LAYER OR THREE LAYER USING POLYESTER/BOPP/METALLIZED POLYESTER/LLDPE.THESE POUCHES HAVE EXCELLENT PRESENTATION ON RETAIL SHELF AS THEY CAN EASILY STAND UP ON THEIR BOTTOM.TOP IS EITHER SIMPLE OR FIXED WITH RECLOSABLE ZIPPER TO MAKE IT MORE CONVENIENT FOR CONSUMER TO USE IT.