A catalyst composition, comprising at least one supported polymerization catalyst wherein the catalyst composition is modified with at least one fatty amine wherein the fatty amine is substantially free of particulate inorganic material, wherein the at least one fatty amine is represented by the formula: (R 1) x N(R 2 OH) y wherein R 1 is a hydrocarbyl radical having from 8 to 40 carbon atoms; R 2 is a hydrocarbyl radical having from 1 to 8 carbon atoms; and x has a value of 1 or 2 and x + y = 3; and wherein the supported catalyst comprises two or more catalyst compounds comprising one or more metallocene compounds and one or more Group 15 containing metal compounds, wherein the one or more metallocene compounds is selected from: (pentamethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(butylcyclopentadienyl)MX 2, Me 2 Si(indenyl) 2 MX 2, Me 2 Si(tetrahydroindenyl) 2 MX 2, (n-propyl cyclopentadienyl) 2 MX 2, (n-butyl cyclopentadienyl) 2 MX 2, (1-methyl, 3-butyl cyclopentadienyl) 2 MX 2, (propyl cyclopentadienyl)(tetramethylcyclopentadienyl)MX 2, (butyl cyclopentadienyl) 2 MX 2 and (propyl cyclopentadienyl) 2 MX 2, and the one or more Group 15 containing metal compounds is selected from: HN(CH 2 CH 2 N(2,4,6-Me 3 phenyl)) 2 MX 2 and HN(CH 2 CH 2 N(2,3,4,5,6-Me 5 phenyl)) 2 MX 2, wherein M is Zr or Hf, and X is selected from the group consisting of F, Cl, Br, I, Me, benzyl, CH 2 SiMe 3, and C1 to C5 alkyls or alkenyls; wherein the term "substantially free" means that the fatty amine comprises less than 2 % by weight of particulate inorganic material. R 1 is a hydrocarbyl radical having from 8 to 40 carbon atoms; R 2 is a hydrocarbyl radical having from 1 to 8 carbon atoms; and x has a value of 1 or 2 and x + y = 3; and wherein the supported catalyst comprises two or more catalyst compounds comprising one or more metallocene compounds and one or more Group 15 containing metal compounds, wherein the one or more metallocene compounds is selected from: (pentamethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(butylcyclopentadienyl)MX 2, Me 2 Si(indenyl) 2 MX 2, Me 2 Si(tetrahydroindenyl) 2 MX 2, (n-propyl cyclopentadienyl) 2 MX 2, (n-butyl cyclopentadienyl) 2 MX 2, (1-methyl, 3-butyl cyclopentadienyl) 2 MX 2, (propyl cyclopentadienyl)(tetramethylcyclopentadienyl)MX 2, (butyl cyclopentadienyl) 2 MX 2 and (propyl cyclopentadienyl) 2 MX 2, (pentamethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(propylcyclopentadienyl)MX 2, (tetramethylcyclopentadienyl)(butylcyclopentadienyl)MX 2, Me 2 Si(indenyl) 2 MX 2, Me 2 Si(tetrahydroindenyl) 2 MX 2, (n-propyl cyclopentadienyl) 2 MX 2, (n-butyl cyclopentadienyl) 2 MX 2, (1-methyl, 3-butyl cyclopentadienyl) 2 MX 2, (propyl cyclopentadienyl)(tetramethylcyclopentadienyl)MX 2, (butyl cyclopentadienyl) 2 MX 2 and (propyl cyclopentadienyl) 2 MX 2, and the one or more Group 15 containing metal compounds is selected from: HN(CH 2 CH 2 N(2,4,6-Me 3 phenyl)) 2 MX 2 and HN(CH 2 CH 2 N(2,3,4,5,6-Me 5 phenyl)) 2 MX 2, wherein M is Zr or Hf, and X is selected from the group consisting of F, Cl, Br, I, Me, benzyl, CH 2 SiMe 3, and C1 to C5 alkyls or alkenyls; wherein the term "substantially free" means that the fatty amine comprises less than 2 % by weight of particulate inorganic material. HN(CH 2 CH 2 N(2,4,6-Me 3 phenyl)) 2 MX 2 and HN(CH 2 CH 2 N(2,3,4,5,6-Me 5 phenyl)) 2 MX 2, wherein M is Zr or Hf, and X is selected from the group consisting of F, Cl, Br, I, Me, benzyl, CH 2 SiMe 3, and C1 to C5 alkyls or alkenyls; wherein the term "substantially free" means that the fatty amine comprises less than 2 % by weight of particulate inorganic material.