Scuba Snorkel
A scuba snorkel, at its essence, is a simple device. The
average snorkel has two parts, a mouthpiece and a barrel. The barrel
stays above the water line, allowing the diver to breathe normally through
the mouthpiece.
The size of barrel that a scuba snorkel employs plays an important
role in how well it functions. Divers with larger lung capacities require
larger diameter barrels in order to efficiently breathe in and out.
The same can be said inversely.
A scuba snorkel is generally made from either rubber or silicone. Rubber
is usually less expensive to manufacture, but also tends to dry and
crack over time. Silicone is more popular because it generally has a
longer lifespan.