Most of us wear long-sleeved jerseys for a few days in spring and autumn, then extend their use by adding a vest over them in cooler weather, and layering them under a jacket in extremely cold conditions, where they also serve as an insulating layer. That's why a thermal jersey shouldn't be too bulky or complicated, but must remain functional. This jersey therefore offers all the essential features, such as excellent fabric, a perfect fit, well-designed pockets, and our lightweight, easy-to-use YKK® Vislon® zipper.