This Cressi mask is called the "Big Eye Evolution" mask for a good reason: the revolutionary design gives you a better vision and the skirt is more comfortable than ever. The downward visibility has increased by 25% compared to earlier Cressi models. In the black mask, this is assisted by the fact that the black colour blocks out light coming in from the sides giving you clearer vision in the water.
A minimal internal volume using tempered glass designed with angled lens so that the mask can sit closer to your eyes and increase your field of vision. This low volume allows you to dive to several metres depth without worrying much about equalising. These lenses can also be replaced by prescription lenses of your preference.
The high-seal silicone skirt is soft and the design of the skirt allows the mask to have a point of contact with the face at a very open angle. The skirt also has various levels of rigidity to give effective sealing over the whole skirt. It is constructed of from a liquid seal, which is extremely comfortable and doesn’t leave red pressure lines.
The head strap comes in three materials and is very narrow: invisible when wearing the mask.
The adjustable buckles are joined to the head strap with a plastic material which is strong yet malleable which allows it to flex under pressure making them very durable. The buckles use a flexible pivoting system designed to make adjusting your straps easier.
See below video for more information: