Polyethylene films and methods of making the same

A polyethylene film comprising a polymer composition, wherein the polymer composition comprises:

• from 75 wt % to 99 wt % of a metallocene linear low density polyethylene (LLDPE) based on the weight of the polymer composition, and from 1 wt % to 25 wt % of a cyclic olefin copolymer based on the weight of the polymer composition, wherein:
• the metallocene LLDPE
• comprises from 80 wt % to 99 wt % ethylene derived units and 1 wt % to 20 wt % units derived from one or more C3 to C20 α-olefins;
• a hafnium concentration of greater than 5 ppm by weight;
• has a density in the range of from 0.905 g/cm3 to 0.930 g/cm3;
• has a melt index (I2) in the range of from 0.1 g/10 min to 2.0 g/10 min;
• has a melt index ratio (MIR) in the range of from 25 to 80;
• and
• has a molecular weight distribution (MWD) in the range of from 1.5 to 5.5;
• and
• the cyclic olefin copolymer has a glass transition temperature (Tg) of greater than 100° C. as measured by DSC method, and wherein the cyclic olefin copolymer comprises greater than 70 wt % of or more cyclic olefin derived units by weight of the cyclic olefin copolymer.