Silicone Crystal a new, incredible, frontier in the world of transparency. It has a long durability, does not turn yellow and, thanks to its special chemical composition, drastically reduces the tedious fogging effect of the lenses. An absolute exclusive Cressi. Revolutionary mask made of High Seal, a new material that offers extraordinary and unprecedented comfort. Not only was this new High Seal silicone chosen, exceptionally soft and comfortable, but the whole design of the facial followed new rules that allow to have a contact point of the mask on the face with a very open angle. The mask rests on the face with comfort never seen before and leaves no mark on the skin, even after prolonged use. To obtain a similar result, the facial structure has been obtained with Double Injection Technology, an unprecedented injection system that allows you to differentiate the stiffness of the facial at each point, stiffening it where it is necessary to have a non-deformable structure, softening it where the maximum comfort. The inclined inverted drop-shaped glasses (Cressi patent) are small in size and as close as possible to the pupils, in order to increase the already extraordinary visibility of the Matrix by 25%. The headband makes use of the exclusive Cressi system (patented) of double injection of an elastomer on a rigid element and allows the belt buckles to be mounted not on the facial structure, like the competition, but on an elastic and indestructible element, tilting on a vertical plane which can be completely folded laterally on a 180 ° arc. The thickness of the headband has been reduced and is such as to completely disappear from view, with the mask worn. Big Eyes Evolution is already prepared for optical lenses: a small screwdriver and a few seconds are enough to mount the optical lenses prescribed by the ophthalmologist instead of standard glasses.