Hollis M1 Mask Visibility is the most important aspect of any dive, and the Hollis M1 Mask elevates optical quality to new heights. The lens, crafted from ultra-clear glass, not only boasts an aesthetically pleasing appearance but also delivers exceptional optical qualities. The low iron content in the lens ensures higher light transmittance, eliminating the green tint often found in other glasses. This results in distortion-free vision, enhancing colour and visibility in low light conditions underwater. M1 Mask Features: Frameless 100% pure silicon skirt Saint-Gobain Diamant – Ultra Clear Lens Wide vision and low volume
