The LS2 Stream II Helmet stands at the forefront of full-face motorcycle helmets, attributing its lead to an aerodynamic, sports-inspired shell constructed from LS2's proprietary Kinetic Polymer Alloy (KPA). This advanced material blend incorporates nanotechnology to weave microscopic aramid fibers into a high-end polymer, delivering not only remarkable energy management but also flexibility, which helps to absorb force without the harsh rebound found in inferior materials. Meeting the stringent ECE 22.06 specifications for rotational energy management, the helmet leverages Advanced Rotational Energy Management Technology (AREM), yet another LS2 innovation designed to enhance rider safety. The inclusion of a rear spoiler optimizes flow-through ventilation, while the 3D laser-cut foam in the cheek pads, combined with a removable and washable liner featuring a special flex-crown comfort system, ensures superior comfort and ease of maintenance. With three shell sizes and five EPS liner options, the Stream II offers a custom fit that is exceptionally comfortable. The excellence in construction and performance establishes the Stream II as a prominent option for riders seeking a high-quality full-face helmet.