Futures Fins EA Techflex Thruster Fin Set Grey MThe EA Techflex, designed by Hawaiian shaper Eric Arakawa of Arakawa Designs, is a medium size thruster in the Rake template category. The Techflex construction and flat foil give this fin a stable feel, making it ideal for controlling speed in more powerful waves. Over 40 years of surfboard design won't do you wrong, trust Arakawa when the waves get interesting.