Latest Cressi Swim Mask that utilizes our patented Crystal Silicone skirt just like our scuba mask line * Double injection skirt insures great fit and tremendously clarity * Lenses are mounted at an 18 degree angle to improve field of vision * Features a micro metric buckle adjustment * CRYSTAL silicone is an exclusive CRESSI material that revolutionizes swim mask skirt clarity. It offers incredibly clear vision and features long-lasting advanced technologycomponents within the pure silicone skirt which prevents premature discoloration, reduces fogging, and guarantees many years of CRYSTAL clear viewing.