9. Layering Must-Have: This form-fitting V-neck polo can be worn on its own or layered under another hot fashion trend (a sweater vest). 10.

Princess Diana, sheep-sweater innovator, at a polo match in 1983. If you want to recreate the look yourself, you need only look to Lanvin, which created Styles's knit ode to ungulates.

One Harper’s Bazaar fashion editor test-drives Vince’s cashmere polo sweater in butter yellow, and it’s quickly become one of her favorite wardrobe pieces.