An extruded tube comprising a heterophasic polypropylene composition comprising (a) a heterophasic polypropylene copolymer, (b) an antioxidant comprising a sterically hindered phenol wherein the heterophasic polypropylene copolymer fulfil the following features: (i) the relative amount of crystalline polypropylene in the heterophasic polypropylene copolymer is above 20wt%, (ii) the relative amount of xylene cold solubles fraction in said heterophasic polypropylene copolymer is at least 10 wt%, (iii) the relative content of isolated ethylene sequences (I) of the XCS fulfills the equation: I E < 78 − 1.97 xC + 0.015 x C 2 wherein C is the comonomer content [wt%] of the XCS fraction and wherein the I content is defined by equation: I E = fPEP fEEE + f PEE + fPEP × 100 wherein I is the relative content of isolated to block ethylene sequences [in %]; fPEP is the mol fraction of propylene/ethylene/propylene sequences in the sample; fPEE is the mol fraction of propylene/ethylene/ethylene sequences and of ethylene/ethylene/propylene sequences in the sample; fEEE is the mol fraction of ethylene/ethylene/ethylene sequences in the sample wherein all sequence concentrations being based on a statistical triad analysis of 13 C-NMR data. (a) a heterophasic polypropylene copolymer, (b) an antioxidant comprising a sterically hindered phenol (i) the relative amount of crystalline polypropylene in the heterophasic polypropylene copolymer is above 20wt%, (ii) the relative amount of xylene cold solubles fraction in said heterophasic polypropylene copolymer is at least 10 wt%, (iii) the relative content of isolated ethylene sequences (I) of the XCS fulfills the equation: I E < 78 − 1.97 xC + 0.015 x C 2 wherein C is the comonomer content [wt%] of the XCS fraction and wherein the I content is defined by equation: I E = fPEP fEEE + f PEE + fPEP × 100 wherein I is the relative content of isolated to block ethylene sequences [in %]; fPEP is the mol fraction of propylene/ethylene/propylene sequences in the sample; fPEE is the mol fraction of propylene/ethylene/ethylene sequences and of ethylene/ethylene/propylene sequences in the sample; fEEE is the mol fraction of ethylene/ethylene/ethylene sequences in the sample wherein all sequence concentrations being based on a statistical triad analysis of 13 C-NMR data. wherein C is the comonomer content [wt%] of the XCS fraction and wherein the I content is defined by equation: I E = fPEP fEEE + f PEE + fPEP × 100 wherein I is the relative content of isolated to block ethylene sequences [in %]; fPEP is the mol fraction of propylene/ethylene/propylene sequences in the sample; fPEE is the mol fraction of propylene/ethylene/ethylene sequences and of ethylene/ethylene/propylene sequences in the sample; fEEE is the mol fraction of ethylene/ethylene/ethylene sequences in the sample wherein all sequence concentrations being based on a statistical triad analysis of 13 C-NMR data. I is the relative content of isolated to block ethylene sequences [in %]; fPEP is the mol fraction of propylene/ethylene/propylene sequences in the sample; fPEE is the mol fraction of propylene/ethylene/ethylene sequences and of ethylene/ethylene/propylene sequences in the sample; fEEE is the mol fraction of ethylene/ethylene/ethylene sequences in the sample wherein all sequence concentrations being based on a statistical triad analysis of 13 C-NMR data.