A polyolefin composition made from or containing:

T1) 50-90 wt % of a recycled polyolefin mixture; and
T2) 10-50 wt % of a polyolefin component containing:
A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer;
B) 20-50% by weight of a copolymer of ethylene and a C3-C8 alpha-olefin made from or containing 0.1-20% by weight of alpha-olefin units; and
C) 30-60% by weight of a copolymer of ethylene and propylene made from or containing 25-75% by weight of ethylene units.