F4 Alpha Tri Fins front traction adding lift and helping the

adding lift and helping the water squirt through and release

With mega-Odysea float everyone has come to love

Square tread

Adjustable arms for different board sizes

F4 Alpha Tri Fins front traction adding lift and helping theThe F4 Alpha Thruster set by Futures Fins is a small sized, balanced fin with a neutral amount of flex and a neutral template. The perfect entry level fin to progress your surfing Ride Number of 5. 5. Alpha's C6 composite material is carbon and air infused making it lighter than Honeycomb. The responsive flex characteristics of C6 combine with the neutral F Series template to create one of the most exciting new products on the market. All Alpha