The ideal mask for spearfishing and freediving; Super low volume mask with a great field of vision; Ultra-clear HD lenses for faithful color rendering and improved contrast; Rim designed to offer very low resistance in the water. The mask's improved hydrodynamics make a real difference both when descending in free diving and while swimming on the surface; The silicon skirt combines comfort with a close fit for a perfect seal. In addition, the mask's grainy texture helps prevent the fingers slipping during adjustment and during pressure equalization maneuvers