The cardigan may not have been considered the coolest wardrobe staple – until now. This season, it’s been given a modern update with a zip fastening, making it an effortless cover-up for casual days. There’s no shortage of styles to choose from, either: try retro styles by Miu Miu, draped designs by AllSaints or chunky knits by Acne Studios. Easy to throw on with everything from jeans to dresses, a zip up cardigan deserves a place in every closet.