Used Hollis M4 Frameless Mask Diving Octopuses increasing the field of vision

increasing the field of vision dramatically over traditional masks

One button control for easy operation – one button to power light on/off and select brightness

Recommended for all warm water dives

The Helix Compact Pro Octopus provides the same great performance as the Helix COmpact Pro primary second stage

for freedivers and spearfishers

Used Hollis M4 Frameless Mask Diving Octopuses increasing the field of visionPlease note this is a USED ITEM offer. The item will be in good working condition, may show signs of use or wear. 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.