GLASS LENSES...The best sunglasses on the market today. Exceeding the standards of world champion watersport athletes, the Premier Series features Hobie's highest quality thin, lightweight and durable Borosilicate Glass Hydroreflective Polarized lenses, set in carefully crafted frames of Grilamid TR-90 and hand-finished Italian Zyl. The Premier Series also features precision flex hinges for a custom fit and extra durability on some models. Megol Nose pads and Megol Temple tips on some models as well. Each stylie in the series reflects Hobie's uncompromising commitment to quality, innovation, and design. Each style has been carefully rated by size, with measurements, in an effort to assist you and your consumer in making purchasing decisions. Hobie Polarized frames are all backed by our friendly lifetime warranty.