n. Any polymer of ethylene with some higher-olefin content, in the density range from 0.90 to 0.915 g/cm³, produced by the Union Carbide gas-phase process (Flexomer^®). The materials have low moduli, with properties between those of low-density polyethylene and ethylene-propylene rubbers. They are useful for stretchable films. See also ultra-low-density polyethylene.