Top fashion wearing these sport ultra curved sunglasses TR90 frame the most durable sunglasses on the market

TR90 is a thermoplastic material that is incredibly durable, flexible, and lightweight. Glasses made with TR90 are extremely comfortable because they have a flexible quality. Since they are flexible, they can bend under pressure and contour your face comfortably. TR90 frames are virtually indestructible and are ideal for use in sports sunglasses products because they are super-strong and designed to flex making them resistant to stress, cracking, and fatigue.