The Mask
This mask is part of a range of Core Sportviz watersports products that includes swim and snorkel models with polycarbonate lenses.
The UTS Pro Core is a low-volume single-tempered glass lens design. It features a high-grade, hypoallergenic, latex-free, black, soft silicon skirt with a double-reflex seal.
The frame is made from impact-resistant polymer with easy-adjust swivel buckles and has a split strap for even distribution at the back of your head. Fluorescent orange livery finishes off what is a standard type of single-lens dive mask.

The Inserts
Core masks can be fitted with an insert that clips inside them. In the case of the dive-mask it fits to a rail, which in turn sits inside the mask between the top of the nose section and the bottom of the upper part of the mask frame.
The insert, or Inzert as Aquaviz calls it, has an aviator-shaped frame made from either clear or black polymer, and can be fitted with prescription lenses.
Four standard bifocal lenses are available as stock items – akin to buying reading glasses over the counter from your local pharmacy – or else the guys at Aquaviz will make you custom ophthalmic lenses in bifocal, progressive or single prescriptions to suit your requirements.
Empty Inzerts are also available should you wish to get them glazed by your own optician.
The Inzert is fixed in the mask at the same distance from your eyes as a standard pair of glasses for maximum field of vision and to reduce eyestrain.
The Inzerts come in two forms, Standard (clear polymer frame), with no anti-fog coating but supplied with a small tub of fog-free wax, or Pro (black polymer frame), with anti-fog-treated lenses.

In Use
I’ve been trying this mask and insert combination out for a month as I write, under water in varying conditions from freezing UK waters to tropical seas and super-heated swimming pools.
There’s not a lot to report about the mask itself, a standard no-frills model that offers nothing more than others on the market.
It’s the prescription inserts that place this set-up at the head of its class.
They sit in a perfect position, and in my case the bi-focal section allowed me to enjoy sharp definition when viewing my instruments and camera LCD screen.
My main concern initially was that of fogging, not on the mask lens (as with any new mask
I prepared for that by scrubbing the inside with toothpaste and using a mask-clear product) but on the insert lenses.
I feared that water droplets would form and prove difficult to clear, but I’m pleased to report that this didn’t happen. The Inzerts I was given had the anti-fog coating and this seems to stop droplets from staying stuck to the lens – the drops ran away, leaving me with a clear view.
As for fogging, the Inzert coating did its job brilliantly, keeping the lenses from misting up even in the worst-case scenario of very cold water outside the mask and a warm face inside.

Conclusion
Any fears I had were unfounded. The UTS Pro mask is comfortable enough, if a little plain in appearance for my tastes, and it fitted me, kept the water out and worked very well.
The Inzert I used made a big difference to my diving, and for the first time in a long while I had no problem viewing my instruments and camera menus.
Having recently reviewed and marvelled at masks that boast “UltraClear” glazing, such as the Atomic Venom or Hollis M1 models, I’m left wondering if I could fit the Inzert rail to them.
That would be the ultimate solution for optical-appliance-users who dive, don’t you think?

PRICES UTS Pro mask £55, Pro Inzerts with anti-fog: Single Vision £55, Progressive Vision £90, Stock Bifocal £45, Inzert with no lenses £12
CONTACT www.sportviz.co.uk
DIVER GUIDE Mask width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100%
INZERT width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100% width=100%