New Balance Men's Long Sleeve Half-Zip Top (£19.00)
Kerry says: Even in winter you can run up enough of a sweat for your top to be uncomfortably clingy if it doesn't work as hard as you do. This long sleeved top features NB's Lightning Dry technology, a super-fast and effective moisture-wicking weave which moves sweat away from the body to ensure you stay dry and comfortable while you're pounding out the miles. The design is semi-fitted so it won't flap around in the wind, the sleeves have thumbholes for you to pull the arms down if your hands get cold, there is reflective detailing on the front and back and there's even a weather resistant pocket for MP3 players – all in all, a whole lot of technology for £19.
Buy it now from the Runner's World Store!