Hollis M1 Mask Colour:Black The patented Seat Saving Orifice

The patented Seat Saving Orifice prevents wear of the low-pressure seat that extends the service interval and improves reliability

Car charger accessory (optional) enables use anywhere on the go

If you're freediving or snorkelling in open water or anywhere near boat traffic

The Mares Bungee Strap is a fantastic alternative to both rubber straps and stainless steel spring straps

Hollis M1 Mask Colour:Black The patented Seat Saving OrificeWhen we first saw the Hollis M1 Mask, we thought it was just a Hollis branded Oceanic Shadow dive mask but having gone to the Oceanic seminar and sitting through two days of product knowledge we are much more impressed with the thought, effort and design that has gone into the Hollis M1 dive mask and the whole Hollis range to be honest. Due to the Saint Gobain Diamant Crystal Clear Lens and skirt being a bit wider than the shadow, it brings a much