Freedivers typically prefer low-volume snorkels, which have a smaller internal volume and require less effort to clear water from the tube. Low-volume snorkels allow the freediver to exhale a smaller amount of air to clear the snorkel, which conserves oxygen and reduces the risk of hyperventilation.
Freedivers also prefer snorkels that are flexible and lightweight, as these allow for a more natural and comfortable fit in the mouth, reducing jaw fatigue during long dives. Some freedivers prefer snorkels with a curved or angled shape, which helps to reduce drag and make swimming more efficient.
Another feature that some freedivers look for in a snorkel is a streamlined design, which reduces drag and makes swimming more efficient. Some snorkels marketed specifically to freedivers may also have a hydrodynamic shape, adjustable length, or other specialized features.
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