Sub Gear's Sub VU Mask with Purge is a 3 window Mask for more VUs. The Mask has a Premium Clear Double Feathered Edge Seal Silicone Skirt for a great Fit and Comfort. Mask is equipped with a Color Frame in Black, Blue or Yellow for color coordination with your gear. The Seamless Side Windows provide a Panoramic View of the marine environment. If water enters the mask, removal is made easy with the One-Way Purge Valve. This Medium Volume Mask has Tempered Safety Glass Lenses, and a Wide Split Head Strap for added Comfort with Easy Adjust Buckle Assemblies. Equalization of the Ears is made easy with the Easy Access Nose Pocket. To Safely Store the Mask, it comes equipped with a Protective Mask Box.