Fun and affordable, the Quark is Flexifoil’s new The flexifoil Quark is a 3-line kitesurf trainer, designed specifically to help new flyers learn to fly with skill and confidence. The flexifoil quark comes complete and ready to fly, with a 55cm control bar - the Flexifoil Quark is ideal for use in kitesurf schools or for anyone who’s looking for a tough, high performance kitesurf trainer. The Quark also offers experienced fliers a kite to introduce to their friends, or just to fly for fun themselves when the wind is not enough to be on the water!