A polyolefin composition comprising (percent by weight): A) from 80 wt% to 97 wt% of a propylene polymer composition comprising: i) from 50 wt% to 70 wt% of a propylene homopolymer; and ii) from 30 wt% to 50 wt% of a propylene-ethylene copolymer, the sum i)+ii) being 100 said propylene polymer composition A) having; a) a total content of ethylene derived units referred to the sum of the propylene homopolymer i) and the propylene-ethylene copolymer ii) comprised between 0.1 wt% and 3.0 wt% extremes included; b) a xylene soluble fraction at 25°C less than 3.0 wt%; and c) a Polydispersity Index (P.I.), measured with the reolagy method, having a value comprised between 4.0 and 8.0; B) from 3 wt% to 20 wt% of a propylene-ethylene copolymer having a content of ethylene derived units comprised from 42 wt% to 60 wt%; the sum A) + B) being 100 and wherein the ethylene content has been measured by IR spectroscopy said polyolefin composition having: a) an intrinsic viscosity, determined in tetrahydronaphthalene at 135°C, of the xylene soluble fraction (XSIV) ranging from 3 to 6 dl/g; b) a Melt Flow Rate value (MFR, 230°C 5kg, ASTM D 1238 - 86 condition L) ranging from 0.01 to 5 g/10 min; and c) satisfies the following relation: y ≤ − 0.061 x + 2.187 wherein y= XS*C 2 and x = C 2 B / C 2 A + B; C 2 being the amount of ethylene derived units in A); C 2 the content of ethylene in the copolymer B) and C 2 (A+B) the total content of ethylene referred to the sum of A) and B) and XS is the solubility in xylene at 25°C of component A. A) from 80 wt% to 97 wt% of a propylene polymer composition comprising: i) from 50 wt% to 70 wt% of a propylene homopolymer; and ii) from 30 wt% to 50 wt% of a propylene-ethylene copolymer, the sum i)+ii) being 100 said propylene polymer composition A) having; a) a total content of ethylene derived units referred to the sum of the propylene homopolymer i) and the propylene-ethylene copolymer ii) comprised between 0.1 wt% and 3.0 wt% extremes included; b) a xylene soluble fraction at 25°C less than 3.0 wt%; and c) a Polydispersity Index (P.I.), measured with the reolagy method, having a value comprised between 4.0 and 8.0; i) from 50 wt% to 70 wt% of a propylene homopolymer; and ii) from 30 wt% to 50 wt% of a propylene-ethylene copolymer, the sum i)+ii) being 100 a) a total content of ethylene derived units referred to the sum of the propylene homopolymer i) and the propylene-ethylene copolymer ii) comprised between 0.1 wt% and 3.0 wt% extremes included; b) a xylene soluble fraction at 25°C less than 3.0 wt%; and c) a Polydispersity Index (P.I.), measured with the reolagy method, having a value comprised between 4.0 and 8.0; B) from 3 wt% to 20 wt% of a propylene-ethylene copolymer having a content of ethylene derived units comprised from 42 wt% to 60 wt%; the sum A) + B) being 100 and wherein the ethylene content has been measured by IR spectroscopy said polyolefin composition having: a) an intrinsic viscosity, determined in tetrahydronaphthalene at 135°C, of the xylene soluble fraction (XSIV) ranging from 3 to 6 dl/g; b) a Melt Flow Rate value (MFR, 230°C 5kg, ASTM D 1238 - 86 condition L) ranging from 0.01 to 5 g/10 min; and c) satisfies the following relation: y ≤ − 0.061 x + 2.187 wherein y= XS*C 2 and x = C 2 B / C 2 A + B; C 2 being the amount of ethylene derived units in A); C 2 the content of ethylene in the copolymer B) and C 2 (A+B) the total content of ethylene referred to the sum of A) and B) and XS is the solubility in xylene at 25°C of component A. a) an intrinsic viscosity, determined in tetrahydronaphthalene at 135°C, of the xylene soluble fraction (XSIV) ranging from 3 to 6 dl/g; b) a Melt Flow Rate value (MFR, 230°C 5kg, ASTM D 1238 - 86 condition L) ranging from 0.01 to 5 g/10 min; and c) satisfies the following relation: y ≤ − 0.061 x + 2.187