Can you distinguish between stand up pouch of PO and PE material

We can see stand up pouch everywhere in our daily life. However, can you distinguish the materials between PO and PE. Here I will tell you.
 
1. PE material is very soft, very transparent, but thicker PE plastic bags, will feel a little white mist, but does not affect the perspective bag products.Knead it sounds very soft, feel is also very soft, used to do to protect the inner packing products, will not have scratches on products;Po will sound will be more clear, feel very hard, but the same thickness will feel more thick.
 
2. PO material knead together, can be very loud, crunchy sounds;PE plastic bags, and take the sound of the wind almost no friction material.
Our company is stand up pouch manufacturer in China, we can supply varies of packaing bags.