Kate Middleton Wore the Sneakers That Sold Out in One Day

Since announcing her pregnancy earlier this fall, Kate Middleton has kept a fairly low profile. But after debuting her baby bump earlier this month, she's back—and in one of her most low-key outfits to date: leggings and sneakers. 

Middleton visited the National Tennis Center in London dressed for a bit of rally time on the court. While many of her royal duties require formal dress and even a tiara, even on more casual days Middleton's look feels polished. She opted for a black-and-white ensemble that included sleek leggings and Nike Vapormax sneakers. Her sleek sneakers originally launched in March this year, and sold out in a single day.

While we're used to seeing this combination on athleisure-loving celebs and models like Bella Hadid and Kendall Jenner, the combination was something different from the usually buttoned-up Duchess of Cambridge. Sure, it may not be the everyday uniform of royals, but Middleton's sophisticated take on workout wear is one we hope to see more of down the line.

Read on to see Middleton's take on legging and sneakers now and shop her footwear too!

On Kate Middleton: Monreal London Leggings ($145); Nike Vapormax Sneakers ($190)

Middleton opted for a polished tennis look, wearing leggings, sneakers, a polo shirt, and zipped black sports jacket.