Hollis M1 Frameless Mask Speargun Handle Exclusive High-Pressure Piston Seal System:

Exclusive High-Pressure Piston Seal System: Self-Lubricating

directly integrated into the rigid skirt through a solid but flexible rubber attachment that allows you to adjust and place the mouthpiece without shifting the mask

With the button pushed in

The MAKO TITANIUM knife is so light and compact you won't even know it's there

Loaded with features it is designed to protect

Hollis M1 Frameless Mask Speargun Handle Exclusive High-Pressure Piston Seal System:Visibility is the most important aspect of any dive. The M1 Mask raises the bar for optical quality and distortion free vision. The extra crystal clear Saint Gobain Diamant tempered glass single lens is valued for its attractive appearance and optical qualities. The low iron content produces a higher light transmittance and a reduced green tint inherent in other glass. This makes the lens distortion free and helps improve color and visibility in low