The ARS Fit System enables progressive fit adjustment via a thumbwheel. It distributes pressure evenly around the head, eliminating hot spots and pressure points. The adjustable head basket is ponytail friendly. Eighteen vents orientated at a 15-degree angle assures maximum airflow when the helmet is in the riding position. In the event of a crash a polycarbonate layer built inside the helmet keeps the foam together, offering protection from successive impacts.A docking area makes eyewear storage easy and bottom-shell protection helps prevent damage to the helmet foam. The optional Aeroshell accessory protects against the helmets or offers an aerodynamic benefit when desired.The Sphere weighs just 260 grams.