Winter’s must-have fitness accessories

Bum bags are back
A bum bag is the perfect pick for your belongings while you run. Small enough to hardly feel or see, but big enough to fit all the essentials, you’ll never want to run again without it. And now that bum bags are fashionable again, rock the look with this one from Stella McCartney. The floral pattern and muted greys look fab and will work with all outfits.
£30, adidas.com