After reading many discussions about masks and their internal volumes (referred to below as IV) I think we should do some sort of test.
It should be pretty easy to find the IV of your mask.
Step 1: With the mask and your head underwater in a bucket of water/ swimming pool/ bath put on your mask so that it is FULL of water (with the strap - don't just hold it to your face).
Step 2: Take off the mask ensuring you catch all the water from in the mask.
Step 3: Measure the volume of water.
Archimedes would be proud.
What we can achieve by this is:
1. get an averaged approximation of the IV of many models of mask that there may not be official IVs figures for.
2. we can find out what the differences face shape make. If you have been sporting a big nose or big cheekbones, you will likely have a lower IV.
If we can get a bunch of measurements for the same model mask then we can see the variation involved due to face shape.
I'm not sure how much this will prove, but it may be worth finding out.
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