The lightweight, easily packable Race-Series Wind Jacket can be pulled out at a moment's notice if you decide the wind is starting to take the thrill out of your ride. Its recycled polyester front offers a sustainable way to fend off wind chill and lower your wind resistance at the same time. And just in case you're worried about working up a sweat while you're boxed up in a windproof shell, don't--mesh back paneling vents away all that warm air with ease.