Delete this video no use of snorkels use full face mask

I enjoyed this video because of the frequent use of the word "snorkel". Say it with me: SNORKEL.
And again: SNOOORKEL

Goooooooooooooooooooooooooooooooooooood

Excellent!!

One thing not mentioned is the importance of tube size. If the tube is too fat or too long -- or, worst of all, both too fat AND too long -- it can lead to rapid fatigue because they don't allow for full exhalation of CO2 and inhalation of fresh O2; instead, the stale air just moves up and down in a stagnant column.  How big is too big depends a lot on the person using it, with those having large lung capacity being able to move more air with each breath than those with smaller volumes. Just breathing faster won't work the way it would normally, because the stale air is still in the snorkel. There are new snorkels on the market that use two tubes -- either one on each side of the head, or one inside the other -- with one-way valves that separate the inhaled and exhaled air into separate columns, but these are not widely used yet and they have some idiosyncrasies that may turn off some potential users.

good stuff