A polyolefin composition comprising: T1) 50-90 wt%, of a recycled polyolefin mixture containing from 90 wt% to 50 wt% of propylene derived units and from 5 wt% to 40 wt% of ethylene derived units optionally containing up to 15 wt% of a one or more further olefins derived units selected from 1-butene, 1-hexene, 1-octene; said mixture having: i) fraction soluble in xylene at 25°C ranging from 5 wt% to 30 wt%; ii) intrinsic viscosity [η] (measured in tetrahydronaphthalene at 135 °C) of the xylene soluble fraction at 25°C comprised between 0.5 to 4.0 dl/g; iii) melt flow rate (230°C/2.16 kg) ranging between 1 and 50 g/10 min; iv) melting point measured by DSC ranging from 148°C to 162°C; T2) 10-50 wt% of a polyolefin component containing: A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer containing 90% by weight or more of propylene units; component A) containing 10% by weight or less of a fraction soluble in xylene at 25°C, both the amount of propylene units and of the fraction XSA being referred to the weight of A); B) 20-50% by weight; of an ethylene homopolymer having 5% by weight or less of a fraction soluble in xylene at 25°C (XS B) referred to the weight of; and C) 30-60% by weight of a terpolymer of ethylene, propylene and 1-butene derived units containing from 45% to 65% by weight of ethylene units; and from 15% to 38% by weight of 1-butene units; and containing from 30% to 85% by weight of a fraction soluble in xylene at 25°C (XSc), the amount of ethylene units; 1-butene units and the fraction XSc being referred to the weight of; the sum of the amount of T1) and T2), being referred to the total weight of T1) and T2), being 100 wt%; the amounts of, and being referred to the total weight of + +, the sum of the amount of + + being 100 wt%. T1) 50-90 wt%, of a recycled polyolefin mixture containing from 90 wt% to 50 wt% of propylene derived units and from 5 wt% to 40 wt% of ethylene derived units optionally containing up to 15 wt% of a one or more further olefins derived units selected from 1-butene, 1-hexene, 1-octene; said mixture having: i) fraction soluble in xylene at 25°C ranging from 5 wt% to 30 wt%; ii) intrinsic viscosity [η] (measured in tetrahydronaphthalene at 135 °C) of the xylene soluble fraction at 25°C comprised between 0.5 to 4.0 dl/g; iii) melt flow rate (230°C/2.16 kg) ranging between 1 and 50 g/10 min; iv) melting point measured by DSC ranging from 148°C to 162°C; i) fraction soluble in xylene at 25°C ranging from 5 wt% to 30 wt%; ii) intrinsic viscosity [η] (measured in tetrahydronaphthalene at 135 °C) of the xylene soluble fraction at 25°C comprised between 0.5 to 4.0 dl/g; iii) melt flow rate (230°C/2.16 kg) ranging between 1 and 50 g/10 min; iv) melting point measured by DSC ranging from 148°C to 162°C; T2) 10-50 wt% of a polyolefin component containing: A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer containing 90% by weight or more of propylene units; component A) containing 10% by weight or less of a fraction soluble in xylene at 25°C, both the amount of propylene units and of the fraction XSA being referred to the weight of A); B) 20-50% by weight; of an ethylene homopolymer having 5% by weight or less of a fraction soluble in xylene at 25°C (XS B) referred to the weight of; and C) 30-60% by weight of a terpolymer of ethylene, propylene and 1-butene derived units containing from 45% to 65% by weight of ethylene units; and from 15% to 38% by weight of 1-butene units; and containing from 30% to 85% by weight of a fraction soluble in xylene at 25°C (XSc), the amount of ethylene units; 1-butene units and the fraction XSc being referred to the weight of; A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer containing 90% by weight or more of propylene units; component A) containing 10% by weight or less of a fraction soluble in xylene at 25°C, both the amount of propylene units and of the fraction XSA being referred to the weight of A); B) 20-50% by weight; of an ethylene homopolymer having 5% by weight or less of a fraction soluble in xylene at 25°C (XS B) referred to the weight of; and C) 30-60% by weight of a terpolymer of ethylene, propylene and 1-butene derived units containing from 45% to 65% by weight of ethylene units; and from 15% to 38% by weight of 1-butene units; and containing from 30% to 85% by weight of a fraction soluble in xylene at 25°C (XSc), the amount of ethylene units; 1-butene units and the fraction XSc being referred to the weight of; the sum of the amount of T1) and T2), being referred to the total weight of T1) and T2), being 100 wt%; the amounts of, and being referred to the total weight of + +, the sum of the amount of + + being 100 wt%.