Made for military and search-and-rescue divers, the stainless steel frame and strap buckles provide extreme durability. A black, non-reflective coating improves its stealth quality and an updated mask skirt gives a high performance fit. Three panel design gives improved side to side vision with tempered glass lenses that meet ANSI standards. Optional #547 chemical light bar allows for attachment of 4" lightstick (#568). Approved for use by US Navy and US Coast Guard rescue swimmers.