A thermoplastic polyolefin composition comprising: (1) 30-70 wt. % of an heterophasic propylene polymer; (2) 20-60 wt. % of a copolymer of ethylene with a comonomer selected from the group consisting of C3-6 α,β-unsaturated carboxylic acids, C1-8 alkyl esters of a C3-6 α,β-unsaturated carboxylic acid and mixtures thereof; and (3) 2-20 wt. % of a metal compound selected from the group consisting of: acetates, stearates, hydroxides and oxides of zinc, magnesium, calcium, sodium and mixture thereof.