Introducing Footjoy's latest base layer, Phase One 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 Phase One baselayer has the highest level moisture-wicking technology available in Fooyjoy's arsenal. The four-way stretch fabric makes it comfortable & easy to slip on & off.