Promate Pro Viewer Color Correction Scuba Dive Snorkeling Purge Mask - MK285V*Underwater Color Corrective lenses available in Red (bring up lost red color at depth great for warm water diving) or Yellow (for increased light, higher contrast and better separation, especially in low visibility) lenses *Mirror Coated Lenses (hides your eyes and reduces glare while diving) *100% UV protected tempered safety glass lenses *Ideal for medium faces face seal size W4 1 2 * H3 1 2 *Patented purge design *Crystal, liquid silicone injected