Vitale Barberis Canonico’s “Revenge” Super 150s is the most luxurious wool suiting fabric J. Hilburn offers. Its number indicates the fineness of its individual fibers — the higher the number, the narrower the fiber. This translates into a soft, smooth material that’s perfect for a formal suit or dinner jacket. Of note: An ivory jacket should only be worn during summer months or in a year-round temperate zone. Available in formal and suiting.