Hollis promises you distortion-free vision with its frameless M1 dive mask. The extra clear glass in the M1 ensures a very high optical quality for your underwater adventure! The M1 is a low volume mask and, thus, easy to clear. It features a 100% pure silicon skirt for a comfortable and sealed fit.
Both colour and visibility are improved in low light conditions underwater, due to the low iron content, which produces a higher light transmittance and a reduced green tint. Perfect for underneath the surface. What a great mask for superior vision in your favourite element.