The M3 Mask provides distortion-free vision and a superior fit. The low iron content produces a higher light transmittance and a reduced green tint inherent in other glasses. Optical lenses from -1.5 to -8.0 diopters available.
Wide face, beard & mustache. This mask seals great and doesn't flood. Also get GoPro clip. Just finished diving Stingray City in Grand Cayman and mask worked really well.