Windfoiling, aka 'Foil Windsurfing', is considered one of the most important innovations that windsurfing has seen in the past 20 years. Basically the same as windsurfing but replacing the usual fin with a hydrofoil. The foil lets you fly quietly and peacefully in very light winds above the water. With a windfoil, you usually need sails that are 2 sqm less than what you would normally use. 1 board, 1 foil, 1 or 2 sails, and 1 boom should be more than enough to cover the 10 to 20 knots wind range.