Scubapro Crystal Vu Plus Mask with Purge, Black 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.