LDPE (low density polyethylene) and its cousin LLDPE (linear low density polyethylene) are the workhorses of the poly bag industry. They are widely used across all markets due to its clarity, supple feel and inherent flexibility.(1.5Mil 500cs) Advantages of LDPE Poly Bags Good Clarity: Although not quite as clear as polypropylene, LDPE poly bags have good clarity for general purpose applications. LDPE and LLDPE resins are produced in various clarity levels, so it is a good idea to specify the clarity desired to your supplier. Good Strength: LDPE and particularly LLDPE, have good overall strength properties without sacrificing overall clarity with increased mil thicknesses. Specialty LLDPE resins such as Octene or Hexene enhance the performance of LDPE. By sharing the intended end use of your packaging, a custom poly bag manufacturer can provide the best mix of properties to provide product success. Good Moisture Retention Properties: As a member of the olefin family of resins, LDPE and LLDPE are good materials to keep moisture within the package or prevent moisture from migrating to the product in the package.