The Giro Air Attack Shield Helmet shaves precious time when you’re racing and training with its sleek, streamlined profile that’s wind-tunnel tested for maximum efficiency. Keeping your vision unobstructed at high speeds, its Air Attack shield redirects air with its Flash shield. This polycarbonate shield is produced by Carl Zeiss optics, easily fastening out of the way with its magnetic clips. The Roc-Lite Air fit system slightly elevates the helmet off your head, facilitating air flow and heat exhaustion with the internal channeling and six external vents. This system also adjusts for a secure, stay-put fit with the simple twist of a dial.