Hollis M-1 Dive Mask Gear Bags Features a 1000 denier replaceable

Features a 1000 denier replaceable nylon cover and replaceable underwater paper

A peculiar feature of the Flex version is the corrugated hose

but is easily removed from the sewn sheath with one hand

Purge valve: Angled purge valve

Hollis M-1 Dive Mask Gear Bags Features a 1000 denier replaceableVisibility is the most important aspect of any dive and the M1 Mask raises the bar for optical quality and distortion free vision. The lens is ultra 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.