Cressi Nano Crystal, black/black, mirrored lens

Innovative mask for scuba diving and advanced freediving, designed to offer an extremely hydrodynamic and compact shape. Cressi has developed this mask by innovating the technical design. Even 3 patents were registered for making the Nano!. It is the mask on the market with the lowest internal volume (12.86 in2 | 83 cm2), an ideal requirement for freediving lovers. 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 for improve downward visibility, a Cressi's patented design (US 6272693).. The Nano mask is designed and made in Italy by Cressi, a brand pioneer in Scuba Diving, Snorkeling, and Swimming equipment since 1946.