Lightweight Aquapel 1/2 Zip This Callaway men's golf base layer top is crafted from lightweight, thermal material to keep you warm on the course. Designed for comfortable play, it also includes added stretch for a full range of motion for smooth swings. This base layer thermal top also features Aquapel fabric, making it water repellant, with a convenient 1/2 zip closure for practicality and easy layering. Features: Thermal keeps you warm Stretch to give full range of motion WEATHER SERIES™ Water