e Mares X-Vision mask is made from super soft silicone and with a hydrodynamic design has a 20% wider field of visions when compared to previous version. This is also a great mask for changing out the lenses with prescription lenses if required. The small ribs around the nose help to reduce pressure and make it comfortable when spending long periods in the water. The side buckles are super easy to adjust even when wearing thick gloves. This mask is comfortable and durable making it suitable for all divers.