Introducing FootJoy's latest base layer, PhaseOne has been designed to keep your body's temperature regulated all day long. Made using a Graphene print design which aids in the retention of body heat through advances thermal conductivity. Worry not, if you start to perspire, the PhaseOne baselayer has the highest level moisture-wicking technology available in Fooyjoy's arsenal. The four-way stretch fabric makes it comfortable and easy to slip on and off.