Swimear designer Heidi Klein. Photograph: Observer
1- Keep it simple. I'm a fan of elegant, clean lines. I love taupes and blacks and clothes that are relaxed and plain. A classic white shirt is essential.
2- It's all about accessories. Statement jewellery, a fabulous pair of shoes, lovely belts. I have a cocktail ring that was passed down to me and I always feel special when I wear that.
3- I like a cropped jean. I spent a lot of time in Ibiza when I was younger and noticed the Spanish wore their trousers a little too short, so I took the look from them. You could say I was being fashion-forward: everyone wears cropped trousers these days.
4- Have one piece you feel amazing in. I bought a midnight-blue Dolce & Gabbana dress a few seasons ago and it's getting a lot of wear. I don't believe in fast fashion. I buy pieces that will last.
5- Wear things that make you feel confident. I love killer high heels and the way they look on other people, but I'm hopeless in them. You need to be able to walk in them, otherwise you look a bit daft. I spend a lot of time in ballet pumps.
Heidi Klein's latest swimwear range is available at heidiklein.com