The perfect shades for your lil something xx frame: cat eye -lens details: uva/uvb 400 and protection -frame material: TR90 - extras: mirror lens, RX able, hypoallergenic and includes case WHAT IS TR90?? TR90 is a hypoallergenic and non toxic thermoplastic material that is incredibly durable, flexible and lightweight. Frames made with TR90 are extremely comfortable and can bend under pressure and contour to your customers face comfortably. Because of the flexibility, it also makes them resilient to damage - they are made for active kids!