The helmet features a double-D rings closure and comes prepared for the Sharktooth communication system, although, if you want to have it, you must buy it separately. In addition, visor adds some level of security thanks to its four-point anchoring system, inspired by the Race R Pro GP, and it also features quick-release mechanism so no tools needed to remove the visor. Finally, the shape of the Spartan RS was designed and developed to limit aerodynamic movements, minimize the effect of wind drag and reduce noise at medium and high speeds. As Shark usually does, it was not tested in a wind tunnel, but they have done it with their own software. In this way, and in my personal opinion, it is a shame to see how it influences the finish of the helmet and its wind resistance, contrary to how higher quality brands develop the design using the expensive testing method of wind tunnel testing. This is the only point where the Spartan RS Carbon Skin really disappoints and gets just 1.5 stars, although its competitors do not stand out in this regard either, which makes sense. Eventually we are talking about entry level helmet which usually miss all the bells and whistles of high-end helmets