Design Philosophy. Wind – friend or foe dependant on the direction, but almost always a factor when riding on the road in winter. The Windchill range acts as a windproof shield preventing heat loss while transporting sweat away from your body creating a comfortable, warm micro climate. The Windchill Jacket II provides 360 degree wind protection and loads of pockets to carry the ride essentials, making it the perfect partner for blustery rides. It won’t reduce the headwind but it will help keep your body working at its optimum temperature to push on and enjoy the ride.