Better still, styles have long shaken off their less-than-chic reputation, and Uniqlo's HeatTech range is a case in point. From turtlenecks to tights and accessories, Uniqlo’s range uses ...

are even filming reels of themselves packing the Uniqlo Puffy Bag, to prove how much you can fit it – one Reel I found even saw a Stanley Thermos fitting into the bag. And that’s a big bottle!