Tusa Imprex III Hyperdry (M-32) Scuba MaskThe M 32 Imprex 3D Hyperdry mask is a re design of TUSA's very popular TM 8000Q Imprex Hyperdry, but with several key improvements. The M 32 features TUSA's patented Hyperdry System which allows for easy, no nonsense clearing of the mask with a single exhalation. Simply breathe out through your nose and any water that has accumulated in your mask is forced out through a One Way Purge Valve, once the Mask is Clear, the Valve Seals Shut Automatically.