LS2 Helmets Stream II Solid Helmet W/ Sunshield The LS2 Stream II Solid Helmet features an aerodynamic, sport styled shell made from LS2s proprietary Kinetic Polymer Alloy (KPA). KPA uses nanotechnology to blend microscopic aramid fibers 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 rotational energy management specifications using Advanced Rotational Energy Management Technology (AREM), 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 liners 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 ready face shield (Pinlock sold separately) Meets or exceeds ECE 22.06 and DOT FMVSS standards