Cable insulation or jacketing comprising: from 20.0 wt% to 80.0 wt% of component T1) being an interpolymer of ethylene and less than 7 wt%, of one or more polymerizable comonomers including (but not limited to) unsaturated esters and hydrolyzable silane monomers; from 0.5 wt% to 5.0 wt% of a peroxide; from 20.0 wt% to 80.0 wt% of component T2) comprising A) 5-35% by weight of a propylene homopolymer containing 5% by weight or less of a fraction soluble in xylene at 25°C (XS A), or a propylene ethylene copolymer containing 90% by weight or more of propylene units; containing 10% by weight or less of a fraction soluble in xylene at 25°C (XS A), both the amount of propylene units and of the fraction XS A being referred to the weight of A); B) 20-50% by weight; of a copolymer of ethylene and a C 3 -C 8 alpha-olefin containing from 0.1% to 20% by weight of alpha-olefin units and containing 25% by weight or less; of a fraction soluble in xylene at 25°C (XS B), both the amount of alpha-olefin units and of the fraction XS B being referred to the weight of; and C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25% to 75% by weight of ethylene units and containing from 40% to 95% by weight of a fraction soluble in xylene at 25°C (XSc), both the amount of ethylene units and of the fraction XSc being referred to the weight of; the amounts of, and being referred to the total weight of + +, the sum of the amount of + + being 100. from 20.0 wt% to 80.0 wt% of component T1) being an interpolymer of ethylene and less than 7 wt%, of one or more polymerizable comonomers including (but not limited to) unsaturated esters and hydrolyzable silane monomers; from 0.5 wt% to 5.0 wt% of a peroxide; from 20.0 wt% to 80.0 wt% of component T2) comprising A) 5-35% by weight of a propylene homopolymer containing 5% by weight or less of a fraction soluble in xylene at 25°C (XS A), or a propylene ethylene copolymer containing 90% by weight or more of propylene units; containing 10% by weight or less of a fraction soluble in xylene at 25°C (XS A), both the amount of propylene units and of the fraction XS A being referred to the weight of A); B) 20-50% by weight; of a copolymer of ethylene and a C 3 -C 8 alpha-olefin containing from 0.1% to 20% by weight of alpha-olefin units and containing 25% by weight or less; of a fraction soluble in xylene at 25°C (XS B), both the amount of alpha-olefin units and of the fraction XS B being referred to the weight of; and C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25% to 75% by weight of ethylene units and containing from 40% to 95% by weight of a fraction soluble in xylene at 25°C (XSc), both the amount of ethylene units and of the fraction XSc being referred to the weight of; A) 5-35% by weight of a propylene homopolymer containing 5% by weight or less of a fraction soluble in xylene at 25°C (XS A), or a propylene ethylene copolymer containing 90% by weight or more of propylene units; containing 10% by weight or less of a fraction soluble in xylene at 25°C (XS A), both the amount of propylene units and of the fraction XS A being referred to the weight of A); B) 20-50% by weight; of a copolymer of ethylene and a C 3 -C 8 alpha-olefin containing from 0.1% to 20% by weight of alpha-olefin units and containing 25% by weight or less; of a fraction soluble in xylene at 25°C (XS B), both the amount of alpha-olefin units and of the fraction XS B being referred to the weight of; and C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25% to 75% by weight of ethylene units and containing from 40% to 95% by weight of a fraction soluble in xylene at 25°C (XSc), both the amount of ethylene units and of the fraction XSc being referred to the weight of; the amounts of, and being referred to the total weight of + +, the sum of the amount of + + being 100.