ONOS Sierra TR-90 Frame Sunglasses with Add Power Polarized Polycarbonate Lens Polarized decentered polycarbonate lens construction with 100% UVA UVB protection Lightweight durable TR-90 frame construction providing the best in frame performance All sunglasses come with a lifetime warranty against manufacturers defects Available reader add strengths are +1.50 +2.00 +2.50 and single vision