Cressi Dual Lens Prisma Diving MaskThe Prisma is much more than a mask; it is a reliable companion for exploring the underwater world in full clarity. The Prisma is equipped with the Cressi patented FOG STOP system, which drastically reduces fogging through the internal thermoregulation of the warm, damp air exiting the nose. The external part of the skirt additionally features a cooling system made of soft head exchangers that act as radiators. This effect drops the temperature inside