Hollis M-4 Frameless Mask 2nd Stage Increase Efficiency

Increase Efficiency

Automatic Safety Stop Prompt at 15'(4

Lightweight Great Travel Fin

Two Levels of Softness Two Different Hardness

Hollis M-4 Frameless Mask 2nd Stage Increase EfficiencyThis products Overview When choosing a mask, fit and field of vision come first. The M 4 gives you the best of both worlds, fitting a wide variety of faces and offering superior peripheral and vertical vision. It is low profile, stows easy and carries an excellent value. Mask has a single lens made from tempered glass for excellent optical characteristics and safety. The frameless black silicone skirt has a double feathered edge for a perfect seal,