Hollis M-4 Frameless Mask NAVCON enriched air – the M1

enriched air – the M1 is perfect for recreational divers ready to extend their capabilities or accomplished technical and specialty divers

The Hollis Mesh Duffel Bag is ideal for wet dive gear storage as it allows easy water drainage as your equipment dries

3/8" Threaded 31

Directly Attached to Face Shield

Hollis M-4 Frameless Mask NAVCON enriched air – the M1This 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,