Bare Duo B Two Window Mask Bare Sport Duo B Mask color Blue - Black Double Feathered Edge Skirt Twin Lens Tempered Glass Push-Button Buckle Wide Strap This super lightweight and durable mask is fitted with tempered safety glass lenses, is a low volume mask with a wide field of view that is easy to clear. The mask is equipped with a one-hand easy to reach nose pocket for ear equalization that even works well with thick gloved hands. Popular because customers like the following qualities of the Bare Sport Duo B Mask: Lens Quality, Range of Vision, Snug Fit. The Bare Sport Duo B Mask is commonly used for Open Water Diving, Recreation, Snorkeling and more. This product has a limited warranty of24 monthsfor parts and24 monthsfor labor.