Galvin Green Spike Baseball Cap The Spike Cap is another superb addition to our range of Galvin Green headwear. The fabrics in the VENTIL8™ PLUS garments are engineered to give an extremely high level of breathability and excellent moisture-wicking properties. The yarn is made from polyester, since polyester does not absorb moisture, but pushes it to the surface of the fabric where it is spread out (wicking effect) and evaporates.  FEATURES AT A GLANCE Golf cap. Circumference for adjustable width: 54-62 cm (21,3-24,4 inches). Made from 100% Polyester One Size Fits Most Extremely breathable Quickdry