Windshields are made from impact resistant Plexiglas acrylic to prevent dangerous shattering and potential injury. (70% Modified Impact, 30% acrylic) .1875 inch thick. Acrylic is non-yellowing, non-crazing and UV resistant. Fast and easy installation. Hinge uses a flexible polyurethane that is mechanically interlocked to the hard acrylic sections to insure that it will not separate. Full ONE YEAR WARRANTY for hinge breakage or splitting. Warranty begins from date code etched on hinge. Clean windshield using mild soap in clean water, rinse with clean water, then dry with a soft cotton towel. Never use Windex.