The Big Eyes evolution crystal mask is one of the adult high-end masks in the market suitable for scuba diving and snorkeling. Features inclined and inverted tear-drop lenses for improve downward visibility, a Cressi patented design (us 6272693). The field of view is particularly wide, laterally and in the lower zone. The lenses are made of tempered glass. The easy-to-use integrated buckles (Cressi patented technology) are integrated with the frame with a swivel system for quickly strap length adjustment. Made in crystal silicone, a Cressi trademark Formula for avoid yellowing after years. The mask is designed and made in Italy by Cressi, brand pioneer in scuba diving, snorkeling and swimming equipment since 1946.