Hollis M-4 Frameless Mask NAVCON RDP (Cross) with altitude correction

RDP (Cross) with altitude correction and O2 limits based on the NOAA tables and provides altitude adjustability from 3

3/8" Threaded 31

Multi-Function Colour Temp - 5000K

Water-resistant zippers with sturdy pulls for protection from the elements

Hollis M-4 Frameless Mask NAVCON RDP (Cross) with altitude correctionThis 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,