There's nothing like a piece of clothing that can be worn in loads of different ways. And no, we don't mean wrapping your trousers around your head as a makeshift hat.
We're talking about things that can be used as either outer or inner layers, like this Ralph Lauren Gilet (my-wardrobe, £325). Wear it as a coat over a jumper in autumn or you can wear it underneath a coat when the chill hits. While gillets can be a bit confusing, they just might end up being the swiss army knife of your wardrobe once you wrap your head around them.