There’s nothing more invigorating than a winter walk in the fresh air – it’s so good for your mental health and it can also help with seasonal affective disorder. The dose of natural daylight is key, as it ups levels of serotonin (your body’s very own feelgood chemical) and vitamin D, which help boost your mood and immune system. So get outdoors when you can, just remember to wrap up warm, and stock up on base layers such as women’s thermals, men’s thermals and kids’ thermals, plus cosy coats all round.