Masks should be made from the highest quality materials super transparent silicone, tempered glass lenses, high impact thermoplastic frames. Snorkels have come a long way from the breathing tubes of days gone by. They supply plenty of air, are resistant to accidental water entry, and are easy to clear. A well designed snorkel should feel invisible to the diver, as if it weren't there at all. Breathing should be almost as natural as breathing on land.
Adjustment is a major key to snorkel comfort.
Move it forward and back along your mask strap, or up and down, to avoid any feeling of pulling on your mouth. Underwater propulsion can be laborious without the right fins . Buying the best quality regulator you can afford is always recommended. A poor quality regulator can cause excess breathing resistance at depth can cause the diver to work harder, leading to excess carbon dioxide, the leading cause of fatigue, anxiety and panic. The style you choose should be based on the type of diving you plan to do and what feels the most comfortable.