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What's TR90 Frames？ TR90 is a thermoplastic material that is incredibly durable, flexible, and lightweight. Frames made with TR90 are extremely comfortable. Because of the TR90 frame’s flexibility, it also makes them resilient to damage. Since the material is pliable, they are far less likely to break or bend from impact. TR90 glasses are supremely lightweight. The TR-90 material allows for an extremely comfortable, all-day wear. Because it’s an ultra-lightweight material, more so than any acetate frame, and possesses a rubber-like texture, the consumer will feel like they aren’t even wearing glasses. For those that have sensitive skin, the TR90 frames would also make a good alternative. The TR-90 material is hypoallergenic for those that may receive a skin reaction from acetate or metal frames.