According to the query buybuy.com shows:

1.91PE is a high-quality polyethylene material with good flexibility, transparency and durability. It is suitable for packaging a wide range of foods, such as meat, vegetables, fruits and deli foods, etc. 91PE Crisper Bags also have good air permeability, waterproof and cold resistance, so they perform well in refrigerated and frozen environments. In addition, 91PE fresh bags are relatively environmentally friendly and do not produce toxic gases when burned. In supermarkets, the restaurant industry and the daily life of families, 91PE fresh bags have a wide range of applications.

2. PE fresh bag is made of polyethylene (Polyethylene) material, which has better flexibility, transparency and durability. It is suitable for packaging a variety of foods, such as baked goods, candy, nuts, etc. PE fresh bag has good air permeability and waterproof, but slightly inferior to 91PE fresh bag in terms of cold resistance.PE material is a widely used food packaging material, which is considered a safe and environmentally friendly choice. PE fresh bags are widely used in food processing, packaging, retail and home use.