Model One by RIA Eyewear is our founding style of sunglasses built to give uncompromised vision and protection on the tennis and pickleball court with a seamless, one-piece lens housed in our patented Italian frame design. This pair features our newest lens, Photochromic Radium HD+, a photochromic lens that adjusts tint intensity according to the amount of UV light in the environment, changing from clear to dark gray and featuring an azure blue anti-reflective coating to keep your eyes as comfortable as possible. Whether you're playing in bright sun, overcast conditions, or inside under lights, this lens has you covered for it all.Lens Material: Polycarbonate (shatterproof and 100% UV400 protective) Frame Material: Swiss Nylon (durable, yet lightweight) Premium Coatings: Anti-moisture, anti-fog, anti-scratch, and anti-smudge Lens Category: 3 - 0 - dark gray to clear (photochromic) Antireflective Color: Azure Blue Where It's Made: Italy