Titanium is one of the most ingenious natural elements, which possesses unique properties. Titanium is ultra-lightweight, flexible, durable, hypoallergenic, and non-corrosive. With their low density and high strength material it makes it the best material in eyeglass frames.
TR90 is a thermoplastic material that is incredibly durable, flexible, and lightweight. Frames made with TR90 are extremely comfortable. Since they are flexible, they can bend under pressure and contour your face comfortably. Extremely lightweight that you don't feel it on your face.