Kate Middleton’s impeccable style is always making headlines, but it’s a simple pair of navy shorts that has people talking now.

The royal mom, 37, arrived at a charity sailing race with Prince William on Thursday in a colorful striped peplum top by Sandro and her L.K. Bennett trousers. But she immediately changed into a more sea-friendly outfit: a white polo and jacket by Gill Marine, a navy baseball cap, New Balance sneakers and navy shorts.

The outing marked the first time that Kate has been spotted in public wearing shorts since she became a royal. The last time she was photographed in shorts was in September 2008 at a Day-Glo Midnight Roller Disco Party in London. The future royal wore neon yellow shorts and a sparkly green top for the festive event.