North's Sonar S210 freeride foil stabilizer: North's new thinner profile and higher aspect ratio carbon stabilizers offer reduced resistance and a more efficient outline. Exceptional glide. North's S270 is your go-to for all round kite, wing and surf performance, offering optimal balance, speed, efficiency and control. Pair the S210 with a smaller front wing for high-speed performance and a more agile feel. Pair the S320 with a larger front wing for early planing, greater balance and stability.