Keep the rain, snow and mud from getting inside your helmet, or use as a quick aerodynamic solution to close off the front and side vents. Aeroshell is a great accessory for compatible Lazer helmets! When every second counts, the Lazer Aeroshell is the answer, delivering an instant increase in aero efficiency. Just snap into place to cover top and side vents, reducing drag while still allowing air to flow from the front to the rear of the helmet. Compatible with specific Lazer helmet models, the Aeroshell is your ultimate defense against rain, snow, and mud. Simply snap the fitted plastic cover over your helmet and youre ready to roll no matter what the weather throws at you.