The i3 Silicone Mask has an Exceptional Field of Vision. Two Side Windows in addition to the Wide Front Glass Increase the Side Viewing Angle Significantly. Mares R&D and Design Divisions have conducted numerous Computer Simulations and Complex Studies on the Shape of the Human Face. The results are a Mask which combines Great Comfort with an Incredible Field of Vision. Mask is equipped with the new High Tech Buckles and a Newly Designed X-Shaped Split Style Mask Strap this strap feature along with a Double Feathered Edge Silicone Rubber Skirt makes for Superior Comfort and Fit. Mask uses Tri-Comfort Technology. Tri-Comfort Technology is accomplished with small horizontal ribs between the frame and the skirt in the area around the nose. These Ribs Absorb and Redistribute the Pressure Exerted by the Frame onto the Mask Skirt, with a resulting Increase in Comfort. All of the top Mares technologies condensed into one mask. This Medium Volume Light Weight Mask has a Easy to Reach Nose Pocket that allows One-Handed Ear Equalization even when wearing gloves, Tempered Safety Glass Lenses with two colors in Clear and one in All Black Silicone, make this one sought after mask for diving. To protect your mask, included is a Mask Box and a 24 month limited warranty.