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I always ask my self. whats the difference between a low volume mask and a high volume mask???
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You have to put some air into the mask in order to equalise the water pressure. The more air you put in the mask, the less air is left for equalisation of your sinuses/ears. In essence, you have to equalise bigger total volume. You really want to reduce that volume to minimum, hence smaller mask or even fluid goggles. The smaller mask, the deeper you can equalise.
