The main advantage to motorcycle windshields is that they stop the wind from reaching the rider’s face. This is clearly a big advantage for anyone who wants a more comfortable motorcycle ride and is especially important in cold weather conditions. The One-piece windshield is made of extra thick 4.5mm Lexan FMR hardcoated polycarbonate. This means a windshield that is 20 times more resistant to breaking under impact than a comparable style made from acrylic. One Piece Heavy Duty Windshields are precisely cut for the motorcycles they are designed for. Lexan FMR Polycarbonate, 4.5mm in thickness - Lexan Polycarbonate with FMR hardcoat is the highest quality motorcycle windscreen material available. It is virtually indestructible.