Cross-Linked Polyolefin Composition

A polyolefin composition comprising, all percentages being by weight:

• A) from 5 to 38% of a polypropylene component comprising a propylene homopolymer or a propylene copolymer with at least one α-olefin comonomer or combinations thereof, said polypropylene component containing at least 85% of propylene and having a solubility in xylene at room temperature lower than 20%;
• B) from 35 to 85% of a copolymer of ethylene with propylene, containing from 42 to 70% of ethylene and having solubility in xylene at room temperature greater than 50%;
• and
• C) from 5 to 45% of a polymer composition comprising a blend of:
• i) from 20 to 80% of an ethylene copolymer having a Shore A hardness value of at most 90 points and containing up to 45% of at least one α-olefin comonomer, provided that, when propylene is present as comonomer, such copolymer i) has a composition which is different from B);
• ii) from 20 to 80% of a propylene copolymer having a Shore A hardness value of at most 90 points and containing up to 40% of at least one α-olefin comonomer;
• wherein the amounts of A), B) and C) are referred to the total weight of A)+B)+C) and the amounts of i) and ii) are referred to the weight of C).