We can all agree that, when you're living in the UK, a stylish mac is a necessity, not a luxury. The best kind of mac is lightweight and water-resistant. Because Marks & Spencer's Stormwear Car Coat ticks every box, and it only costs £65. Made from a cotton-polyester blend, the coat is made using water-resistant Stormwear™ technology, essentially a water-repelllent finish that will protect against light showers, keeping you dry and cosy. M&S has some amazing items in stores and online at the moment, from kitten-heeled ankle boots to faux leather trousers.