This is the ScubaPro Crystal VU Plus with Purge Scuba Diving MaskFeatures: Patented single lens design with side windows creates a panoramic field of vision. Ultra-clear no-tint glass delivers optimal clarity under water. Crystal-clear double-sealing skirt is comfortable against the skin and keeps water out. Low volume styling and convenient swivel buckles allow for a snug fit and ease of clearing. EZ-grab nose pocket makes easy work of equalizing. Available with or without a purge valve. The CRYSTAL VU PLUS&';s large single lens design plus seamless side windows equal an expansive view under water, and the no-tint glass makes that view extremely clear. Offering new styling with low internal volume, the crystal-clear double-sealed silicone skirt offers a seal that is both comfortable against the skin and watertight while producing a very open, airy feel that&';s especially nice when diving in darker waters. Swivel buckles allow for the perfect fit and an exclusive paint process lets you dive with style. "