High density EVA foam anatomically molded for comfort. ShockStop™ insert absorbs energy on direct blows. High strength SureFit™ strap delivers a more secure fit and adjusts to any helmet, high or low hookup. Polycarbonate shell deflects and spreads energy on hard hits. Strategically located air vents provide maximum ventilation. Patented hydraulic action GelPad™ disperses energy on contact.