Functionality is key when it comes to Mackage's outerwear, but you needn’t worry – this doesn't come at the expense of style. The Calla puffer jacket is proof of this, crafted from water-repellent fabric and detailed with the label’s signature fox-fur collar for a sleek and utterly luxurious finish.How to wear Harrods: Style with a sweater, sweatpants and sneakers.