The madison zena womens ls thermal jersey worn by itself during spring and autumn or as a mid layer in winter the zena thermal jersey is a great 3 season jersey for any british mountain biker the front zipper allows you to regulate your temperature madison zena womens ls thermal jersey features mesh underarm vents provide a constant flow of cool air zippered rear hip pocket provide plenty of space for a phone and keys an elasticated rear hem with silicone gripper keeps the j