Last month, Zendaya designed her own windbreaker with On. Weeks later, fashion search engine Lyst crowned the trend Q1's "Hottest Product." See? Her style spidey-sense is worth trusting. Saint Laurent 's windbreaker technically took first place on Lyst's report, but on April 30, Zendaya proved her rendition has major "hot" item potential. After wearing a spring color combination at husband Tom Holland 's Wednesday tennis tournament, Z zoomed from L.A. to On 's SoHo, NYC store. Rumor has it, she was filming another ad for the Swiss brand—in the sportswear she and stylist Law Roach co-designed . She re-styled an outfit from the original campaign, beginning with the $250 Half-Zip Anorak. Zendaya wore head-to-toe On, including the windbreaker trend, around New York City. (Image credit: Backgrid) The oversize, quarter-zip jacket combines a black base with a preppy, extra-large white stripe across the middle.…