The return of varsity jackets en vogue isn’t solely based on nostalgia — the silhouette has royal ties, too. Ever since Netflix released the fourth season of The Crown, we’ve had Princess Diana on the brain, seeking out the truth behind her sapphire engagement ring, as well as shoppable alternatives to her best fashion moments. A pioneer of the varsity aesthetic for adults, Diana wore her fair share of collegiate crewnecks, baseball caps, and cycling shorts. In 2019, Hailey Bieber recreated many of the late princess’s most famous sportswear looks in a shoot for Vogue Paris. But Diana’s most casual (and coveted) look has yet to make it on the show, nor was it incorporated into Bieber’s shoot. The item? Her green-and-silver Philadelphia Eagles varsity jacket that she debuted in 1991 before recycling it three years later.