It's more than just a cool looking bike helmet. The Giro Air Attack Shield bike helmet combines excellent aerodynamics, comfort, and ventilation - very rare in a bike helmet - with innovative design. It has a polycarbonate eye shield made by Zeiss optics, which provide protection with a clear, unobstructed field of view. When the magnetically fastened eye shield is not needed, you can easily remove it and then have it reattached upside down on the helmet so that it's out of the way while still maintaining its good looks. If you don't need the shield at all, you can save some money on the Giro Air Attack Bike Helmet ($200) (without the shield).