You might not have thought that you needed to invest in a new sports bra come the winter season, but wait until you hear about the MyZone MZ-Switch Sports Bra (£50). Made from 92% polyamide and 8% elastane, the longline bra's sweat-wicking fabric removes humidity to help keep your body dry, whilst also providing you with an extra layer. Plus, this is the world's first sports bra to be able to track your heart rate. Featuring a built-in sensor strap that you can clip onto your Myzone MZ-Switch heart rate tracker (sold separately), this directly measures heart rate and calorie burn performance.