It's plenty warm on its own, but when paired with a vest this jersey is great for most of your fall, mild winter, or early season riding. The brushed fleece back fabric is warm and stretchy to provide a great fit. It's also breathable to help keep you from overheating. We've added three back pockets, a silicone gripper elastic, and an easy-sliding YKK® Vislon® zipper. The subtle design pairs with a vest for a great look and extra function.