LS2 Stream Evo Matt Black Full Face Motorcycle Helmet with Internal Sun Visor. The Stream Helmet starts with a proprietary lightweight and aerodynamic Kinetic Polymer Alloy shell. The technical fabric comfort liner wicks away moisture and includes cheek pads cut from one solid piece of high-quality foam using LS2’s 3D Laser Technology for a perfect fit and no hot spots. It is fully removable and washable so, you can keep it fresh. The Stream has the easiest-to-use Tool-less Quick Release on the market and makes swapping shields a breeze. The face shield is scratch-resistant, optically correct, and Pinlock ready. LS2 added a built-in Twin Shield System drop-down sun shield, so you get an amazing helmet at an unbelievable value.