A multilayer film comprising an outer layer, wherein the outer layer means that one surface of the outer layer is an outermost surface of the film, the outer layer comprising: a polyethylene having a density of 0.930 g/cm 3 or greater; and 0.01 to 1 weight percent of an additive based on the total weight of the outer layer, the additive comprising: (i) a sorbitol acetal derivative comprising the structure of formula: wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C 1 -C 3 alkyl; or (ii) a bisamide comprising a structure of formulas,, or: wherein R1 and R2 in formulas,, and comprise the same or different moieties chosen from: C 1 -C 20 alkyl unsubstituted or substituted by one or more hydroxy; C 4 -C 20 alkenyl unsubstituted or substituted by one or more hydroxy; C 2 -C 20 alkyl interrupted by oxygen or sulfur; C 3 -C 12 cycloalkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; (C3-C 12 cycloalkyl)-C 1 -C 10 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; bis[C 3 -C 12 cycloalkyl]-C 1 -C 10 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; a bicyclic or tricyclic hydrocarbon radical with 5 to 20 carbon atoms unsubstituted or substituted by one or more C 1 -C 20 alkyl; phenyl unsubstituted or substituted by one or more radicals selected from C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 1 -C 20 alkylamino, di(C 1 -C 20 alkyl)amino, hydroxy and nitro; phenyl-C 1 -C 20 alkyl unsubstituted or substituted by one or more radicals selected from C 1 -C 20 alkyl, C 3 -C 12 cycloalkyl, phenyl, C 1 -C 20 alkoxy and hydroxy; phenylethenyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; biphenyl-(C 1 -C 10 alkyl) unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthyl-C 1 -C 20 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthoxymethyl unsubstituted or substituted by one or more C 1 -C 2 alkyl; biphenylenyl, flourenyl, anthryl; a 5-to-6-membered heterocylic radical unsubstituted or substituted by one or more C 1 -C 20 alkyl; a C 1 -C 20 hydrocarbon radical containing one or more halogen; or tri(C 1 -C 10 alkyl)silyl(C 1 -C 10 alkyl) dibenzylidene sorbitol; wherein the outer layer has a 50% seal strength temperature at least 10° C greater than an outer layer in a comparative film that differs only in the absence of the additive in the outer layer, when sealed to itself at a pressure of 5 bar with a dwell time of 0.5 seconds; and wherein the film has a gloss of at least 30 at 45° as measured based on ASTM D2457; wherein density and seal strength are measured in accordance with the description. a polyethylene having a density of 0.930 g/cm 3 or greater; and 0.01 to 1 weight percent of an additive based on the total weight of the outer layer, the additive comprising: (i) a sorbitol acetal derivative comprising the structure of formula: wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C 1 -C 3 alkyl; or (ii) a bisamide comprising a structure of formulas,, or: (i) a sorbitol acetal derivative comprising the structure of formula: wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C 1 -C 3 alkyl; or (ii) a bisamide comprising a structure of formulas,, or: wherein R1 and R2 in formulas,, and comprise the same or different moieties chosen from: C 1 -C 20 alkyl unsubstituted or substituted by one or more hydroxy; C 4 -C 20 alkenyl unsubstituted or substituted by one or more hydroxy; C 2 -C 20 alkyl interrupted by oxygen or sulfur; C 3 -C 12 cycloalkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; (C3-C 12 cycloalkyl)-C 1 -C 10 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; bis[C 3 -C 12 cycloalkyl]-C 1 -C 10 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; a bicyclic or tricyclic hydrocarbon radical with 5 to 20 carbon atoms unsubstituted or substituted by one or more C 1 -C 20 alkyl; phenyl unsubstituted or substituted by one or more radicals selected from C 1 -C 20 alkyl, C 1 -C 20 alkoxy, C 1 -C 20 alkylamino, di(C 1 -C 20 alkyl)amino, hydroxy and nitro; phenyl-C 1 -C 20 alkyl unsubstituted or substituted by one or more radicals selected from C 1 -C 20 alkyl, C 3 -C 12 cycloalkyl, phenyl, C 1 -C 20 alkoxy and hydroxy; phenylethenyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; biphenyl-(C 1 -C 10 alkyl) unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthyl-C 1 -C 20 alkyl unsubstituted or substituted by one or more C 1 -C 20 alkyl; naphthoxymethyl unsubstituted or substituted by one or more C 1 -C 2 alkyl; biphenylenyl, flourenyl, anthryl; a 5-to-6-membered heterocylic radical unsubstituted or substituted by one or more C 1 -C 20 alkyl; a C 1 -C 20 hydrocarbon radical containing one or more halogen; or tri(C 1 -C 10 alkyl)silyl(C 1 -C 10 alkyl) dibenzylidene sorbitol;