BILT Nomad Hyper Modular HelmetThe BILT Nomad Modular Helmet features an injection molded aggressively shaped shell designed for maximum performance. Multiple vents allow air to enter and exit the helmet at speed keeping you cool and comfortable. A quick release push button chin bar makes it easy to eat a snack, sip some water or talk to someone without having to yank off your helmet. Simply lock it down when you're ready to hit the road again. Its internal drop down sun visor is ready to mitigate the sun with a flip of a switch.Shell: Injection molded alloy composite modular shell Aggressive shell design with aerodynamic shape for sleek performance 2 shell sizes:XS-2XL and 3XL-5XL Shield: Clear Pinlock A Pinlock lens is made to enjoy a fog-free ride. It is based on two key principles to ensure a fog-free vision. The moisture absorbing surface of the lens effectively attracts and stores water molecules, while the airtight seal creates a thermal barrier together preventing condensation of the visor. The system is kept in place by positioning the lens between two adjustable pins, making Pinlock the number one anti-fog solution for helmets. Readyface shield Drop-down tinted sun visor Comfort: Multi point surface mounted airflow ventilation system including chin, forehead, and metal mesh rear exhaust vents Removable moisture-wicking comfort padded lining andcheek padshavea antimicrobial finish to help keep your helmet fresh Safety: DOT certified Double D-ring The Double D-ring closure is THE tried-and-true motorcycle helmet retention system. Consisting of two "D" shaped rings, the rider laces the opposing strap through the closure to secure the helmet. It is strong, simple, reliable and infinitely adjustable. Some helmets use alternative closure methods, but the Double D-ring remains the gold standard for these reasons. strap safety fastening system Quick release push button chin-bar operation