The 5 fin set  includes three 4

with an anti slip texture to keep it in place

It is easy to us

Memory 18 hours of memory

SURFCO PROTECH POWER FLEX FCS 4X3.75 QUAD SET fcs regular leashes The 5 fin set includesPower Flex is a Pro Teck Fin with a medium core flex. The fin bends on turns, and then springs back, creating forward thrust similar to a swim fin. The medium flex core and flexible trailing edge makes the board turn smooth and fluid, with continuous speed. This quad set includes two (2) 4. 50" side fins and two (2) 4" trailer fins. Power Flex Fins are recommended for intermediate to professional surfers. Available in Futures or FCS fin systems.