The Windproof Sport Top from Knox is a lightweight, warm, windproof mid layer top designed to reduce the effects of wind chill on a motorcycle. We have searched high and low, across several different sporting worlds for a zip front jacket that could line our regular gear and keep the chill from penetrating. Finally we found what we were dreaming of in this product. With a fully windproof front and breathable stretch back, you can stay warm without overheating. The user friendly details on this jacket are everywhere, from the softest chin lining to the stretch cuffs. This jacket is worth the investment!