During Manatee Season, it is policy to wear a snorkel/mask & wetsuit while swimming. Wetsuits provide buoyancy, which allows a swimmer to stay floating in the Passive Observation Position, as seen in the
. The wetsuits also provide warmth against the never changing 72F(21C) spring water. The snorkel/mask allows visibility at all times which is key to avoid kicking, or swimming into, a manatee or restricted Manatee Resting Areas. The Three Sisters Springs' restricted sanctuary zones are marked off with boundaries located UNDERWATER.