This is the Sherwood Onyx Black Silicone Mask with QD Buckles Low Profile Freediving Spearfishing mask Features: Stealthy matte black finish. Low profile, dual lens design. Quick adjusting buckles. Tempered glass lenses. The upgraded Sherwood Onyx, now with Quick Disconnect (QD) Buckles and optional Corrective Lenses! The Onyx mask is a low profile dual lens mask that comes in a single color Stealth Black Silicone. This mask is perfect for spearfishing, freediving, or scuba diving. The low profile provides a tremendous field of view and is easy to purge.