By turning a smooth thumb wheel, situated on top of the helmet the system permits an accurate and progressive peripheral sizing adjustment. The fit of the helmet will symmetrically be tightened without any pressure points on the head.

 

The Aeroshell is a plastic cover, designed to fit perfectly over specific models of Lazer helmets. The Aero Shell snaps into place and protects the riders head from wind and rain while still allowing for some air movement under the front of the helmet and out the rear vents.