ΔΙΑΘΕΣΙΜΟ ΝΟΥΜΕΡΟ : MEDIUM Tip of spear. Ahead of the curve. Leader. All are accurate descriptions for the new Forefront. A full-coverage helmet ideal for all-mountain riding or racing, the Forefront's AEROCORE™ construction featuring Koroyd® creates a low volume helmet with ventilated protection that fully integrates with your sunglasses, goggles, light, or POV camera.