Most of the time there is a hard ridge between a dive mask lens and skirt – this is called the frame. However a few sucuba diving masks lack this feature and they are known as frameless masks. The Aqualung Sport Nabul is one such frameless mask.
The advantage of a scuba diving mask being frameless is that it is more compact, more streamlined, easy to clear and exerts less pressure on the wearers face. Pretty good right!?
The downside is that it is supposedly more prone to leaking and also not as durable.
However, I’ve had my AquaLung Nabul since 2018 – it’s been round the Philippines, Costa Rica, Panama and Nicaragua and in that time it has not attained any damage. This may be because it’s so high quality.
When I first bought it, it lay well within the upper mid-price category for a scuba diving mask.
It’s only in the last year or so that it’s dropped in price to being a budget scuba diving mask.