The Nano is for advanced divers, freediving and spearfishing lovers, designed to offer an extremely hydrodynamic and compact shape to help divers cut through the water and aid movements in small spaces. For the Nano mask Cressi invented and patented the Integrated Dual Frame Technology System that joins the silicone skirt to the rigid frame lens without interruptions as to guarantee a perfect seal and reduce drastically the internal volume. It does not require intentional equalizing. The swiveling buckles feature micrometric regulation. The mask features inverted teardrop lenses slightly inclined made in tempered glass. An anatomical strap ensure a perfect seal on the head. HD mirrored lenses increase the visions clearness by 15 %.