Process for the preparation of a heterophasic propylene copolymer (RAHECO) comprising a random propylene copolymer (R-PP) and an elastomeric propylene copolymer, wherein the process is a sequential polymerization process comprising the steps of (a) polymerizing in a first reactor propylene and ethylene and/or a C4 to C 12 α-olefin obtaining a first random propylene copolymer fraction (R-PP1), (b) transferring the first random propylene copolymer fraction (R-PP1) into a second reactor, (c) polymerizing in said second reactor in the presence of the first random propylene copolymer fraction (R-PP1) propylene and ethylene and/or a C4 to C12 α-olefin, obtaining a second random propylene copolymer fraction (R-PP2), the first random propylene copolymer fraction (R-PP1) and the second random propylene copolymer fraction (R-PP2) form the matrix of the heterophasic propylene copolymer (RAHECO), i.e. form the random propylene copolymer (R-PP), wherein said matrix, i.e. the random propylene copolymer (R-PP), has a comonomer content of at least 4.0 wt.-%, (d) transferring said the matrix, i.e. said random propylene copolymer (R-PP) into a third reactor, (e) polymerizing in said third reactor in the presence of said the matrix, i.e. of said random propylene copolymer (R-PP), propylene and ethylene and/or a C4 to C12 α-olefin, obtaining a first fraction (E-1) of the elastomeric propylene copolymer of the heterophasic propylene copolymer (RAHECO), said first fraction (E-1) and the matrix, i.e. said random propylene copolymer (R-PP), form a first intimate mixture, (f) transferring said first intimate mixture into a fourth reactor, (g) polymerizing in said fourth reactor in the presence of the first intimate mixture propylene and ethylene and/or a C4 to C 12 α-olefin, obtaining a second fraction (E-2) of the elastomeric propylene copolymer of the heterophasic propylene copolymer (RAHECO), the second fraction (E-2) and the first intimate mixture form the heterophasic propylene copolymer (RAHECO), (h) removing the heterophasic propylene copolymer (RAHECO) from the fourth reactor, (i) optionally visbreaking said the heterophasic propylene copolymer (RAHECO), wherein the heterophasic propylene copolymer (RAHECO) after step (g) and/or (i) (i) has a xylene cold soluble content determined according ISO 16152 (25 °C) in the range of 35 to 55 wt.-%, (ii) has a comonomer content in the range of 8.0 to 17.0 wt.-%, and fulfills inequation Co total Co XCS ≥ 1.0 wherein Co (total) is the comonomer content [wt.-%] of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively, Co is the comonomer content [wt.-%] of the xylene cold soluble fraction of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively. (a) polymerizing in a first reactor propylene and ethylene and/or a C4 to C 12 α-olefin obtaining a first random propylene copolymer fraction (R-PP1), (b) transferring the first random propylene copolymer fraction (R-PP1) into a second reactor, (c) polymerizing in said second reactor in the presence of the first random propylene copolymer fraction (R-PP1) propylene and ethylene and/or a C4 to C12 α-olefin, obtaining a second random propylene copolymer fraction (R-PP2), the first random propylene copolymer fraction (R-PP1) and the second random propylene copolymer fraction (R-PP2) form the matrix of the heterophasic propylene copolymer (RAHECO), i.e. form the random propylene copolymer (R-PP), wherein said matrix, i.e. the random propylene copolymer (R-PP), has a comonomer content of at least 4.0 wt.-%, (d) transferring said the matrix, i.e. said random propylene copolymer (R-PP) into a third reactor, (e) polymerizing in said third reactor in the presence of said the matrix, i.e. of said random propylene copolymer (R-PP), propylene and ethylene and/or a C4 to C12 α-olefin, obtaining a first fraction (E-1) of the elastomeric propylene copolymer of the heterophasic propylene copolymer (RAHECO), said first fraction (E-1) and the matrix, i.e. said random propylene copolymer (R-PP), form a first intimate mixture, (f) transferring said first intimate mixture into a fourth reactor, (g) polymerizing in said fourth reactor in the presence of the first intimate mixture propylene and ethylene and/or a C4 to C 12 α-olefin, obtaining a second fraction (E-2) of the elastomeric propylene copolymer of the heterophasic propylene copolymer (RAHECO), the second fraction (E-2) and the first intimate mixture form the heterophasic propylene copolymer (RAHECO), (h) removing the heterophasic propylene copolymer (RAHECO) from the fourth reactor, (i) optionally visbreaking said the heterophasic propylene copolymer (RAHECO), (i) has a xylene cold soluble content determined according ISO 16152 (25 °C) in the range of 35 to 55 wt.-%, (ii) has a comonomer content in the range of 8.0 to 17.0 wt.-%, and fulfills inequation Co total Co XCS ≥ 1.0 wherein Co (total) is the comonomer content [wt.-%] of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively, Co is the comonomer content [wt.-%] of the xylene cold soluble fraction of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively. Co (total) is the comonomer content [wt.-%] of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively, Co is the comonomer content [wt.-%] of the xylene cold soluble fraction of the heterophasic propylene copolymer (RAHECO) after step (g) and (i), respectively.