Flying Diamonds Of California Skvarna Flux Surfboard Single Fin This is my pick for my 2+1 mid-lengths. Matched with my Sidewinder side bites, this little beast delivers speed, drive, and control. Solid base for drive, but moderate rake and taper keep this fin loose for carving through bottom turns or off the lip. Of course, foil is all about speed. Solid, predictable, and fun.