The Hollis M-1 Mask is a premium frameless dive mask built for divers who prioritize crystal-clear vision, durability, and a streamlined fit. Known for its rugged construction and exceptional optical quality, the M-1 is a favorite among both recreational and technical divers.

At the core of the design is a single-lens frameless construction, reducing bulk while allowing the lens to sit closer to the face. This creates an expansive field of view and a low internal volume, making mask clearing quick and effortless. What truly sets the M-1 apart is its Saint-Gobain Diamant crystal clear lens. Unlike standard tempered glass, this ultra-low iron glass eliminates the green tint, delivering superior light transmission and true color accuracy underwater, ideal for photographers and divers who demand maximum clarity. The 100% pure silicone skirt provides a soft, flexible seal that adapts comfortably to a wide range of face shapes, ensuring a leak-free fit even on longer dives. Combined with durable, low-profile construction, the M-1 is built to perform in demanding conditions.