Force Fins - Not exactly vintage, but going away.

[tridacna]

unless someone buys the forms and uses the correct material AND MOVES PRODUCTION TO CHINA.

FTFY

 

[scrane]

They were long the target of derision and ridicule here on SB until split fins took over.

 

[jadairiii]

The easy recover on the upstroke fools people into feeling they aren't effective, but I've tested them against the ScubaPro Go Sports when flutter kicking and they are essentially equal in speed and power while being more compact and comfortable. And they are amazing when used with a butterfly (aka dolphin) kick.

To a point, most people dont use a power up stroke, so this fin did away with it.

They are fun doing butterfly...but, they are slower than any normal fin. Again, because most people dont use the up stroke. But I do butterfly kick sets within a normal kick set in master swimming workouts.