LDPE film is an industry standard for both inner bags and poly mailers, so it’s usually easy to come by and it's often the cheapest option. It’s lightweight, so it doesn’t add too much cost to shipping. Aesthetically, the opaque, non-porous, white base makes printed colors appear more vibrant, plus matte and gloss options are available.
Petroleum-based; derived from fossil fuels
LDPE film is not curbside recyclable in most cities
Will most likely end up in a landfill because plastic films are low value and difficult to sort. Less than 10% of plastic has been recycled.