A heterophasic propylene ethylene copolymer composition having an MFR 2 measured according to ISO 1333 at 230 °C and 2.16 kg in the range from 1.0 to 55.0 g/10 min and a melting temperature (T m ) measured by differential scanning calorimetry (DSC) in the range from 155 to 162 °C, comprising: a) a crystalline matrix (M) being a propylene homo- or copolymer, preferably a homopolymer; b) an amorphous propylene-ethylene elastomer (E); wherein the heterophasic propylene ethylene copolymer composition is characterized in terms of its soluble fraction (SF) and crystalline fraction (CF) as determined by CRYSTEX QC analysis: i) from 60 to 88 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a crystalline fraction (CF) having an intrinsic viscosity iV(CF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.40 to 2.50 dl/g, a an isotactic pentad concentration [mmmm] as determined by 13 C-NMR spectroscopy of more than 97.0% and a content of 2,1-regiodefects in the range from 0.1 to 0.4 mol%, ii) from 12 to 40 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a soluble fraction (SF) having an intrinsic viscosity iV(SF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.80 to 3.20 dl/g and an ethylene content C2(SF), as determined by quantitative 13 C-NMR spectroscopy, in the range from 25 to 80 wt.-%, wherein the ratio of the intrinsic viscosities of the two fractions, iV(SF)/iV(CF), is in the range from 1.0 to 2.0. a) a crystalline matrix (M) being a propylene homo- or copolymer, preferably a homopolymer; b) an amorphous propylene-ethylene elastomer (E); wherein the heterophasic propylene ethylene copolymer composition is characterized in terms of its soluble fraction (SF) and crystalline fraction (CF) as determined by CRYSTEX QC analysis: i) from 60 to 88 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a crystalline fraction (CF) having an intrinsic viscosity iV(CF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.40 to 2.50 dl/g, a an isotactic pentad concentration [mmmm] as determined by 13 C-NMR spectroscopy of more than 97.0% and a content of 2,1-regiodefects in the range from 0.1 to 0.4 mol%, ii) from 12 to 40 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a soluble fraction (SF) having an intrinsic viscosity iV(SF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.80 to 3.20 dl/g and an ethylene content C2(SF), as determined by quantitative 13 C-NMR spectroscopy, in the range from 25 to 80 wt.-%, i) from 60 to 88 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a crystalline fraction (CF) having an intrinsic viscosity iV(CF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.40 to 2.50 dl/g, a an isotactic pentad concentration [mmmm] as determined by 13 C-NMR spectroscopy of more than 97.0% and a content of 2,1-regiodefects in the range from 0.1 to 0.4 mol%, ii) from 12 to 40 wt.-%, based on the total weight of the heterophasic propylene ethylene copolymer composition, of a soluble fraction (SF) having an intrinsic viscosity iV(SF) measured according to DIN ISO 1628/1, October 1999 (in Decalin at 135 °C) in the range from 1.80 to 3.20 dl/g and an ethylene content C2(SF), as determined by quantitative 13 C-NMR spectroscopy, in the range from 25 to 80 wt.-%, wherein the ratio of the intrinsic viscosities of the two fractions, iV(SF)/iV(CF), is in the range from 1.0 to 2.0. <EOS>