IST Propulsion Black Rubber Fins (F4)

Features of IST Propulsion Black Rubber Fins F4

• The fin is deliberately made slightly shorter but no power is lost through its wider blade and the utilisation of rubber's unmatched flexibility
• In fact, more thrust is gained by the 3 deep vents, which force water backwards, mimicking the effect of water jet
• The fin is not only useful in the ocean but also capable of handling technical dive missions in underwater confined spaces
• The choice of material makes Propulsion durable and long lasting
• IST stainless steel spring fin strap compatible

Product Info for IST Propulsion Black Rubber Fins F4

F4 Propulsion represents the latest evolution of Military-style Fins from IST. Based on IST's iconic and military favorite F-1, the F4'swide blade design is slightly shorter however, there is no power shortage here. That s because of the expanded width rubber blade which incorporates unheard-of flexibility. Even more thrust is attained by 3 deep vents which force water backwards, emulating the effect of three synchronized turbo-powered water jets.

GritrOutdoors is an authorized IST dealer