What is the suitable material to make food bags?

Now plastic bags are widely used in all markets, especially used in food packaging.

We current have 3 different material options to make food bags:

1. PET/LLDPE, This is a totally clear material, the food inside can be seen clearly from the outside.
2. PET/AL/LLDPE, This is an aluminum foil type, which will have a longer shortage time.
3. Kraft paper/LLDPE, This is a natural kraft paper option, that will look more eco.

All samples are free of charge, we can send them for testing if necessary.