Super Lite TR90 Material Bendable Reading Glasses with Eight Magnifications. TR90 is developed with a new material called Thermoplastic polyamide. It is flexible and durable, making these glasses comfortable to wear and resistant to breaking. Features superior scratch-resistant Polycarbonate lenses. Available in multiple magnifications from +1.0 to +4.0 and in four color designs: Black & Red, Black & Blue, All Black, and Black & Orange.