Cressi Spike sunglasses have superior optical quality; they block reflections and protect against up to 100% of UV rays. They offer sharp vision that’s rich in detail while increasing visual contrast. They protect the eyes from solar radiation, filter out glare, and improve vision. Polarized lenses. Available in a broad assortment of colors. The mirrored lenses are coated with CRT (Cressi Revo Treatment) which improves mirroring and offers excellent performance in all light conditions.