A multilayer film, comprising a machine direction oriented (MDO) substrate and a sealant, the MDO substrate comprising a substrate outer layer, a substrate inner layer, and a substrate core layer between the substrate outer layer and the substrate inner layer, wherein: (a) the substrate core layer comprises a first polyethylene and a second polyethylene, the first polyethylene having (i) a density of 0.900 to 0.925 g/cm 3 , measured in accordance with ASTM D-4703 and ASTM D-1505/ISO 1183, (ii) a melt index (MI), I 2.16 , of from 0.1 to 10.0 g/10 min, measured by ASTM D-1238-E (190°C/2.16 kg), (iii) a melt index ratio (MIR), I 21.6 /I 2.16 (190° C), of from 15 to 45, (iv) a weight average molecular weight (M w ) of from 20,000 to 200,000, measured using gel permeation chromatography; (v) a molecular weight distribution (MWD) of from 2.0 to 5.0, measured using gel permeation chromatography; and (vi) a z-average molecular weight (M z ) to weight average molecular weight (M w ) (M z /M w ) ratio of from 1.7 to 3.5; the second polyethylene having a higher density than the first polyethylene; and (b) at least one of the substrate outer layer and the substrate inner layer comprises a third polyethylene, the third polyethylene having a density of 0.910 to 0.945 g/cm 3 , measured in accordance with ASTM D-4703 and ASTM D-1505/ISO 1183, an MI, I 2.16 , of 0.1 to 15 g/10 min, measured by ASTM D-1238-E (190° C/2.16 kg), an MWD of 2.5 to 5.5, measured using gel permeation chromatography, and an MIR, I 21.6 /I 2.16 (190° C), of 25 to 100; and (c) the sealant comprises a sealant outer layer, a sealant inner layer, and a sealant core layer between the sealant outer layer and the sealant inner layer, each comprising polyethylene; wherein the multilayer film has at least one of the following properties, measured according to the description: (i) an average tensile at break of at least 36 MPa; (ii) an average 1% Secant Modulus of at least 620 MPa; and (iii) a non-breakage rate of 100%. (a) the substrate core layer comprises a first polyethylene and a second polyethylene, the first polyethylene having (i) a density of 0.900 to 0.925 g/cm 3 , measured in accordance with ASTM D-4703 and ASTM D-1505/ISO 1183, (ii) a melt index (MI), I 2.16 , of from 0.1 to 10.0 g/10 min, measured by ASTM D-1238-E (190°C/2.16 kg), (iii) a melt index ratio (MIR), I 21.6 /I 2.16 (190° C), of from 15 to 45, (iv) a weight average molecular weight (M w ) of from 20,000 to 200,000, measured using gel permeation chromatography; (v) a molecular weight distribution (MWD) of from 2.0 to 5.0, measured using gel permeation chromatography; and (vi) a z-average molecular weight (M z ) to weight average molecular weight (M w ) (M z /M w ) ratio of from 1.7 to 3.5; the second polyethylene having a higher density than the first polyethylene; and (b) at least one of the substrate outer layer and the substrate inner layer comprises a third polyethylene, the third polyethylene having a density of 0.910 to 0.945 g/cm 3 , measured in accordance with ASTM D-4703 and ASTM D-1505/ISO 1183, an MI, I 2.16 , of 0.1 to 15 g/10 min, measured by ASTM D-1238-E (190° C/2.16 kg), an MWD of 2.5 to 5.5, measured using gel permeation chromatography, and an MIR, I 21.6 /I 2.16 (190° C), of 25 to 100; and (c) the sealant comprises a sealant outer layer, a sealant inner layer, and a sealant core layer between the sealant outer layer and the sealant inner layer, each comprising polyethylene; <EOS>