Easy Speed Vents provide the lease resistance and offer the most relaxed and natural breathing while swimming.
These are provided as standard on all POWERBEATHER models from 9th February 2017. If you purchased before that date the Medium SPEED VENT provides more breathing resistance.
This is a standard length – suitable for pools and calm open water.
For choppy water please see the SPEED VENT Easy Long
SPEED VENT RESISTANCE
SPEED VENT easy for relaxed, natural breathing while swimming or active snorkeling-diving.
SPEED VENT medium for a moderate intensity training of the respiratory muscles.
SPEED VENT power for high-intensity [strength/ tension] muscle training.