Scubapro Crystal Vu Diving Mask (Multiple Colors)A large single lens plus seamless side windows equals an expansive view under water. The double sealed silicone skirt offers a seal that is both comfortable and watertight. An exclusive paint process lets you dive with style. Features Patented tempered glass single lens design with side windows creates a panoramic field of vision. Double sealing skirt is comfortable against the skin and keeps water out. Convenient swivel buckles allow for a snug fit