A polymer composition comprising: at least 55 wt.%, based on the total weight of the polymer composition, of a polyolefin elastomer having an ethylene content of from greater than 50 wt.% to less than 80 wt.%; a cross-linkable blend comprising: (i) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an E/X/Y polymer, wherein: E is ethylene monomer; X is a monomer selected from the group consisting of a C 3 to C 8 unsaturated carboxylic acids, esters of C 3 to C 8 unsaturated carboxylic acids, and anhydrides of C 3 to C 8 unsaturated carboxylic acids, wherein X is present in an amount of from about 2 wt.% to about 30 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and Y is an alkyl (meth)acrylate monomer, wherein Y is present in an amount of from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and (ii) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an epoxy-containing polymer comprising: copolymerized monomers of ethylene, from about 3 wt.% to 15 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of a monomer containing one or more epoxy groups, and from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of an alkyl meth(acrylate) monomer. at least 55 wt.%, based on the total weight of the polymer composition, of a polyolefin elastomer having an ethylene content of from greater than 50 wt.% to less than 80 wt.%; a cross-linkable blend comprising: (i) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an E/X/Y polymer, wherein: E is ethylene monomer; X is a monomer selected from the group consisting of a C 3 to C 8 unsaturated carboxylic acids, esters of C 3 to C 8 unsaturated carboxylic acids, and anhydrides of C 3 to C 8 unsaturated carboxylic acids, wherein X is present in an amount of from about 2 wt.% to about 30 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and Y is an alkyl (meth)acrylate monomer, wherein Y is present in an amount of from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and (ii) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an epoxy-containing polymer comprising: copolymerized monomers of ethylene, from about 3 wt.% to 15 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of a monomer containing one or more epoxy groups, and from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of an alkyl meth(acrylate) monomer. (i) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an E/X/Y polymer, wherein: E is ethylene monomer; X is a monomer selected from the group consisting of a C 3 to C 8 unsaturated carboxylic acids, esters of C 3 to C 8 unsaturated carboxylic acids, and anhydrides of C 3 to C 8 unsaturated carboxylic acids, wherein X is present in an amount of from about 2 wt.% to about 30 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and Y is an alkyl (meth)acrylate monomer, wherein Y is present in an amount of from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and E is ethylene monomer; X is a monomer selected from the group consisting of a C 3 to C 8 unsaturated carboxylic acids, esters of C 3 to C 8 unsaturated carboxylic acids, and anhydrides of C 3 to C 8 unsaturated carboxylic acids, wherein X is present in an amount of from about 2 wt.% to about 30 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and Y is an alkyl (meth)acrylate monomer, wherein Y is present in an amount of from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the E/X/Y polymer; and (ii) from 1 wt.% to 99 wt.%, based on the total weight of the cross-linkable blend, of an epoxy-containing polymer comprising: copolymerized monomers of ethylene, from about 3 wt.% to 15 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of a monomer containing one or more epoxy groups, and from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of an alkyl meth(acrylate) monomer. copolymerized monomers of ethylene, from about 3 wt.% to 15 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of a monomer containing one or more epoxy groups, and from 0 wt.% to 40 wt.%, based on the total amount of monomers present in the epoxy-containing polymer, of an alkyl meth(acrylate) monomer.