Hollis M1 Mask octopus Spring chamber is environmentally sealed

Spring chamber is environmentally sealed to maintain cleanliness reducing the effects of corrosion and contamination

Injection molded thermoplastic LP seat

Case design that is smaller

5mm suits are ideal for diving the cold Pacific Northwest waters year round

For those who run a little warmer or prefer to dive only in the summer the 5

Hollis M1 Mask octopus Spring chamber is environmentally sealedThe M1 Mask raises the bar for optical quality and distortion free vision. The lens is made from Saint Gobain Diamant, a highly transparent extra clear glass which is valued for its unique appearance and optical qualities. The low iron oxide content gives it optimum clarity. Its light transmittance is greater than that of conventional glass. The use of extra clear glass results in a virtually colourless product which allows objects to remain vivid and