Men's Grainger black calf leather ankle boots by PIRELLI PZERO. These stylish low ankle boots feature a rounded stitched toe, lace to front and rubber grip sole. PIRELLI PZERO is internationally renowned for supporting the world of tyres, but has been synonymous with fashion for more than a century. Ever since the annual PIRELLI trade calendar was introduced in 1964, featuring the most striking models of the day wearing beautiful clothing, the brand has been associated with style and elegance.