This is the Promate Pro Viewer Color Correction Mask with Nose Purge Scuba Diving Mask Features: Underwater color correction lenses - available in Red (TrueColor) or Yellow (SharpView) lenses 100% UV protected tempered safety glass lenses Ideal for medium faces Patented purge design Patented channeled skirt design directs bubbles away from view Crystal, liquid silicone injected skirt and strap Double edge comfort seal Low volume Swivel and adjustable buckles Broad peripheral view This Color Correction 2-Window Scuba & Snorkeling Mask is fantastic for scuba diving and snorkeling.