LS2 Stream II Lux HelmetThe LS2 Stream II Helmet features an aerodynamic, sport styled shell made from LS2s proprietary Kinetic Polymer Alloy (KPA). KPA uses nanotechnology to blend microscopic aramid fiber In woven form, aramid is an organic fiber known for excellent mechanical properties, including high tenacity, low density and low conductivity of heat. Mixed with resin and hardened, high impact resistance is yet another characteristic of this fiber. For the two-wheeled folk out there, Aramid is a friend. The fiber - as a cloth - adds abrasion-resistant to riding gear and adds rigidity when incorporated in the shell of helmets. DuPont Kevlar® Aramidic fiber with elevated resistance to tear, wear, shear and heat complemented by low electrical conductivity and high resistance to chemical corrosion. This excellent mechanical performance is matched by the lightweight and softness of the thread that guarantees comfort and a perfect fit at the same time. is a trademarked brand name of (generic) aramid. s with a high-end polymer and allows for amazing energy managing performance with managed flexibility that absorbs energy without the ricochet effect of inferior materials.The Stream II meets the ECE 22.06 ECE 22.06 is a helmet safety rating that extends and increases the testing requirements of ECE 22.05 (with 22.05 being a more modern, more comprehensive European alternative to DOT). With 22.06, 12 additional impact points are analyzed (now totaling 18) and impact speed is increased (from 7.5 to 8.2 m/s). Unlike DOT, every ECE helmet model must actually be tested by an independent lab before it receives 22.06 certification. rotational energy management specifications using Advanced Rotational Energy Management Technology ( AREM LS2's Advanced Rotational Energy Management technology is a proprietary safety system engineered into the liner of select LS2 helmets. The technology reduces energy transfer to the rider's head in the event of angular impact - significantly reducing the chances of major brain injury. AREM equipped helmets exceed ECE 22.06 rotational safety standards, offering pro-level protection to every rider. ), another LS2 proprietary process. The rear spoiler allows for dynamic flow-through ventilation, plus the 3D laser cut foam in the cheek pads, removeable, washable liner with special flex-crown comfort system is super comfortable and easy to keep fresh. 3 shells and 5 energy absorbing EPS liner Expanded polystyrene (EPS) is a rigid, energy absorbing foam. In the helmet industry, EPS is the most common means of energy management to protect the brain. Generic EPS is often referred to as Styrofoam (a trademarked name owned by the Dow Chemical Company). Premium helmet producers utilize multi-density EPS liners to balance comfort, safety and performance. s make for a fit that is nothing short of amazing. The overall finish and performance sets the Stream II at the forefront of full-face motorcycle helmets.Features: Intermediate oval fit 3 shells 5 energy absorbing EPS liners High tech, aerodynamic, sport styled Kinetic Polymer Alloy shell AREM rotational energy management meets ECE 22.06 standards Dynamic, flow-through ventilation Quick release chin strap Class A polycarbonate 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(Pinlock sold separately) Moisture wicking liner andcheek pads Meets or exceeds ECE 22.06 and DOT FMVSS standards