Flat, loose and fast. The S238 Stabilizer is a high-performance upgrade to the Sonar Foil System for experienced riders. It has a higher aspect ratio than the S270, which means less drag, and the flatter rondure (front view) enables more manoeuvrability. The S238 is designed to match the new MA1200/MA1500 and larger HA front wings, giving your setup a faster and more responsive feel.