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.