• Innovative mask for scuba diving and advanced freediving, designed to offer an extremely hydrodynamic and compact shape
• It is the mask on the market with the lowest internal volume (12.86 in3 | 83 cm3), an ideal requirement for freediving lovers
• It features a completely flexible, virtually indestructible buckle system. Patented by Cressi US 8281471 B2
• The Patented Integrated Dual Frame Technology consists of the joining of two rigid frames producing a drastic reduction in the internal volume. Patented by Cressi US 20140013494 A1
• Mask features inclined and inverted tear-drop lenses to improve downward visibility, a Cressi patented design (US 6272693)

The ultimate in comfort and performance, the Big Eyes Evolution Crystal
combines the best of Cressi technologies. Raked lenses, with Cressi' inverted
tear-drop shape, are placed close to the eyes for an exceptional field of
view, and the Crystal Silicone skirt delivers excellent light transmission
while resisting discoloration and fogging. The Crystal Silicone skirt also
seals gently against the skin with a very open angle that accommodates a wide
range of facial shapes.