COUNTRY INNOVATION PUFFIN ZIP OFF JACKET, £125

Billed as their warmest jacket ever, the Puffin is stuffed with ‘Primaloft Gold’, which, weight for weight, is as toasty as down. Plus, it’s breathable and has great water repellency, so you stay dry and cosy whatever the weather does. And it’s highly compressible but regains its loft quickly. The Puffin is versatile, too – you can wear it on its own, unzip the sleeves to turn it into a gilet, or use it under another layer. Comes in sizes S-XXL. countryinnovation.com