Mizuno phenix half zip top ladies the ladies mizuno phenix half zip top has been crafted with warmalite fabric that allows for the thermoregulation of the body teamed with targeted ventilation panels that make it great for use both in the summer and layering up in winter this mizuno running top also benefits from a super soft fabric construction along with a half zip to the neck for added comfort while the reflective detail helps to increase your visibility in low light situations completed