This revolutionary mask is made from High Seal, a new material that offers extraordinary and unprecedented comfort. Not only has this new High Seal silicone been chosen, with its exceptional softness and comfort, but the entire design of the skirt has followed new rules which allow a point of contact between the mask and the face that has a very open angle. The mask rests on the face with unprecedented comfort and does not leave any marks on the skin, even after extended use. Naturally, to obtain such a result the entire structure of the skirt is differentiated, with internal ribs that stiffen the parts of the mask that are most stressed. Big Eyes Evolution has been created to take prescription lenses. The Big Eyes Evolution packaging can be completely recycled and the lower black part has been made from recycled material: Cressi also cares for the environment! Skirt in High Seal silicone Special structure of the skirt has differentiated rigidity Very narrow headband in three materials