Stella McCartney

Sustainability goes across everything I do with Adidas and everything I do with my own house, so the Olympic kit is no exception. It is incredibly environmental in the way that it is manufactured. For example, there's no leather; it's free from PVC. There's lots of woven materials, which means a lot less waste.

The majority of fragrances are designed by people who have no idea what the house does. But for me, it had to be honest. That's where it becomes personal.

What you wear in the evening is important for women because it's so personal, and it's so complicated to get it right. I like trousers for evening, especially when they have that width and attitude to them.