IST F1 Black Rubber Diving Fins Freediving Fins It is made of durable

It is made of durable Nylon with reinforced inner sleeve

It also has loops to attach the knife to your leg or onto your belt and comes with two leg straps

The result is a fin that is extraordinarily practical

SPINEPAD/ZIPPER SEAL

- High Profile

IST F1 Black Rubber Diving Fins Freediving Fins It is made of durableF1 Black Rubber Diving Fins traditional rubber fin with proven design features such as special blade curvature, variable blade flexibility, and well positioned structural ribs. The rubber fin gives positive forward thrust with a spring like effect. The open vents efficiently channel water flow & save energy. IST stainless steel spring fin strap compatible.