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an inhalation effort control knob and Venturi Initiated Vacuum Assist (VIVA) dive/pre-dive switch
Features: Made of high quality PVC
000 hours of diving
Special nose pocket design makes easy work of equalising
Fourth Element - Tec Fin (MILITARY SPEC) Color:Black an inhalation effort control knobA classic vented fin, redesigned to maximise performance. Utilising natural rubber in a unique density gradient, this fin delivers a comfortable foot pocket combined with optimised stiffness for finning performance. The vented design allows water to flow along the blade reducing drag and fatigue, whilst the stiffening rails and ribs ensure that the blade of the fin is driven through the water to maximise the return on effort. The Tech Fins were
