The S13 helmet is our most basic line of helmet. It follows the same visual style and shape as our Evolution Series. Its microfiber structure is supported by transversal and longitudinal braces that are covered with a Fiberglass outer shell and EPS protective liner (Expandable Polystyrene), making this model slightly heavier than La Martina’s Pro-Evo and Evolution helmets. The outer covering is available in a variety of colored canvas.