A sealable, composite flexible packaging structure, comprising: (a) a first substrate comprising paper, cloth, cardstock or coated paper; and (b) a second substrate comprising a polymeric film including at least; a core layer comprising from 60 wt% to 95 wt% of a core polymer and from 5 wt% to 40 wt% of a first polymer, wherein the core polymer comprises isotactic polypropylene and the first polymer is a propylene-ethylene copolymer including from 75 wt% to 96 wt% propylene, from 4 wt% to 25 wt% ethylene, having a density in the range of 0.850 g/cm 3 to 0.900 g/cm 3, a DSC melting point in the range of 40°C to 160°C and a melt flow rate in the range of 2 dg/min to 100 dg/min; at least one tie layer comprising the first polymer and, optionally, a tie layer polymer, the optional tie layer polymer comprising at least one of a C2-C8 alpha-olefin homo-, co-, or terpolymer, a metallocene catalyzed homo-, co-, or terpolymer comprising propylene, and blends thereof; and a sealant layer, the tie layer intermediate the core layer and the sealant layer, and the tie layer is on a side of the core layer opposite the first substrate; wherein the first substrate is adhered to the second substrate on a side of the second substrate opposite the tie layer, and wherein the second substrate does not include any foil. (a) a first substrate comprising paper, cloth, cardstock or coated paper; and (b) a second substrate comprising a polymeric film including at least; a core layer comprising from 60 wt% to 95 wt% of a core polymer and from 5 wt% to 40 wt% of a first polymer, wherein the core polymer comprises isotactic polypropylene and the first polymer is a propylene-ethylene copolymer including from 75 wt% to 96 wt% propylene, from 4 wt% to 25 wt% ethylene, having a density in the range of 0.850 g/cm 3 to 0.900 g/cm 3, a DSC melting point in the range of 40°C to 160°C and a melt flow rate in the range of 2 dg/min to 100 dg/min; at least one tie layer comprising the first polymer and, optionally, a tie layer polymer, the optional tie layer polymer comprising at least one of a C2-C8 alpha-olefin homo-, co-, or terpolymer, a metallocene catalyzed homo-, co-, or terpolymer comprising propylene, and blends thereof; and a sealant layer, the tie layer intermediate the core layer and the sealant layer, and the tie layer is on a side of the core layer opposite the first substrate; wherein the first substrate is adhered to the second substrate on a side of the second substrate opposite the tie layer, and wherein the second substrate does not include any foil. a core layer comprising from 60 wt% to 95 wt% of a core polymer and from 5 wt% to 40 wt% of a first polymer, wherein the core polymer comprises isotactic polypropylene and the first polymer is a propylene-ethylene copolymer including from 75 wt% to 96 wt% propylene, from 4 wt% to 25 wt% ethylene, having a density in the range of 0.850 g/cm 3 to 0.900 g/cm 3, a DSC melting point in the range of 40°C to 160°C and a melt flow rate in the range of 2 dg/min to 100 dg/min; at least one tie layer comprising the first polymer and, optionally, a tie layer polymer, the optional tie layer polymer comprising at least one of a C2-C8 alpha-olefin homo-, co-, or terpolymer, a metallocene catalyzed homo-, co-, or terpolymer comprising propylene, and blends thereof; and a sealant layer, the tie layer intermediate the core layer and the sealant layer, and the tie layer is on a side of the core layer opposite the first substrate;