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The Liberty Duo is a diving mask that features 2 wide inverted teardrop lenses to ensure a complete view of equipment with reasonable internal volume for better clearing and a lower profile in the water. All lenses are tempered glass for the best clarity and are joined in a way that minimizes the visible seam. An excellent choice for both diving and snorkeling, the Liberty Duo provides both improved vision and comfort over previous multi-lens masks. The skirt and the strap are made with hypoallergenic silicone to ensure comfort and a perfect fit. The buckles allow an immediate adjustment of the length strap with one hand, even while wearing gloves. The frame is colored with a beautiful new metallic spray effect.