An ethylene copolymer composition comprising: (i) from 15 to 75 weight percent of a first ethylene copolymer having a density determined using ASTM D792-13, November-1-2013; of from 0.855 to 0.913 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 2.7; and a melt index, I 2 of from 0.1 to 10 g/10min; determined using ASTM D1238; August-1-2013; at 190°C, using a weight of 2.16 kg (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 2.7; and a melt index, I 2 of from 0.1 to 10 g/10min; and (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 6.0; and a melt index, I 2 of from 0.1 to 100 g/10min; wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm 3; a melt index, I 2 of from 0.5 to 10 g/10min; and at least 0.0015 parts per million (ppm) of hafnium; wherein the number average molecular weight, Mn 1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn 2 of the second ethylene copolymer and the number average molecular weight, Mn 3 of the third ethylene copolymer; and wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%. (i) from 15 to 75 weight percent of a first ethylene copolymer having a density determined using ASTM D792-13, November-1-2013; of from 0.855 to 0.913 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 2.7; and a melt index, I 2 of from 0.1 to 10 g/10min; determined using ASTM D1238; August-1-2013; at 190°C, using a weight of 2.16 kg (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 2.7; and a melt index, I 2 of from 0.1 to 10 g/10min; and (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm 3; a molecular weight distribution, M w /M n of from 1.7 to 6.0; and a melt index, I 2 of from 0.1 to 100 g/10min; wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm 3; a melt index, I 2 of from 0.5 to 10 g/10min; and at least 0.0015 parts per million (ppm) of hafnium; wherein the number average molecular weight, Mn 1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn 2 of the second ethylene copolymer and the number average molecular weight, Mn 3 of the third ethylene copolymer; and wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%. wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm 3; a melt index, I 2 of from 0.5 to 10 g/10min; and at least 0.0015 parts per million (ppm) of hafnium; wherein the number average molecular weight, Mn 1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn 2 of the second ethylene copolymer and the number average molecular weight, Mn 3 of the third ethylene copolymer; and wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%.