The slim. The Alpina Lyron S is made for narrow face shapes. The modern full frame design of the glasses provides excellent protection for the eyes during sport. The mirrored lenses of the Alpina Lyron S not only look cool, they also reflect infra-red rays and so reduce strain on the eyes. The break-resistant ceramic material of the lens also offers 100% UV protection and a tint, with protection level cat. 3. Malleable nose pads, as well as temples with a soft insert, ensure the best possible comfort. Meanwhile, a high-quality folding mechanism keeps the strap in its position. Key Features: 100% UV protection,The reflective surface reflects infrared rays,The ceramic material lenses are break-proof and offer 100% protection,Clear, undistorted vision thanks to decentred lenses.