The only snorkeling I’ve done was crouching down in a neighbor’s pool. I don’t think that really counts. My more common snorkeling experience is when that perfect air channel forms under a blanket. I get to keep my head nice and warm while also breathing refreshing cool air. It’s a very delicate sculpture though. If someone else climbs into bed or moves the blanket for some reason it’s lost forever. Then you are left with no choice but full face exposure.