True Ames McTavish Tracker Volan Single FinThe True Ames McTavish Tracker Volan Single Fin is a performance mid length fin. This fin, which originated in 1973, was designed for surfing bigger, powerful, down the line barrels at Lennox. Its longer base provides the necessary drive, while the raked outline allows for powerful, flowing turns. Additionally, the concave taper provides tip twist and "twang," along with highly efficient wash out, which helps reduce tip vortex.