Open Box Hollis M4 Frameless Mask Used Lights The Seac patented breathing system

The Seac patented breathing system directs the inhaled and exhaled air into two completely separate channels

you're going to love this multi-purpose writing slate

2 lbs (1 kg) weights

Heavy-duty case with steel buttons for resistance to water pressure up to 120 m | 393 ft

The device also offers an information screen utilizing a large full color LED LCD display

Open Box Hollis M4 Frameless Mask Used Lights The Seac patented breathing systemPlease note this is an OPEN BOX offer. The item will be in new condition, but may not have original packaging. PRODUCT DESCRIPTION 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. This product does not carry a valid manufacturers warranty.