SEAC M70 Mask is made with semi-frameless technology; the internal volume has been reduced so far that the diver almost never needs to equalize.
Frame, semi-frameless technology with the skirt over molded directly onto the frame.
Skirt, High quality opaque liquid silicone.
Lenses, in 3-mm tempered glass.
Buckle, 3D pivoting directly on the skirt.