Hollis M1 Mask Halcyon Spare Parts It gives your suit the

It gives your suit the same protection your suit gives you

Changeable Exhaust Tees (not included) provide flexibility

Compatible with 40% Nitrox (outside EU)

you can quickly change your exposure suits or switch the system between different divers in a flash

Ultimate breathing sensitivity

Hollis M1 Mask Halcyon Spare Parts It gives your suit theBlack Hollis M1 Mask Hollis M1 Mask offers a frameless design and distortion free vision. The lens is ultra clear glass 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 frees the lens distortion and helps improve colour and visibility underwater in low light conditions. Mask features Frameless 100% pure silicon skirt Saint