Hollis M-1 MASK distortion-free vision Perfect back-up mask as it

Perfect back-up mask as it folds and fits easily in your BC pocket

By applying aramid strings and molding them together with the foam liner

•Bronze grommets for drainage<

even with thick gloves

for tightening and adjusting the collar

Hollis M-1 MASK distortion-free vision Perfect back-up mask as itVisibility 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 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.