Hollis M1 Frameless Low Volume Scuba Diving Mask - Premium Snorkeling & Freediving Gear for Clear Underwater Vision - Perfect for Ocean Exploration, Spearfishing, and Marine Photography

Visibility is the most important aspect of any dive and the M-1 Mask raises the bar for optical quality and distortion-free vision. The lens is an extra clear glass which 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 glasses. This makes the lens distortion free and helps improve color and visibility in low light conditions underwater.