How does a parafoil kite get its wing shape without rigid parts?

A parafoil kite achieves its efficient wing shape without the use of rigid members by relying entirely on the wind to inflate air channels located along its leading edge.1

As the wind enters these channels, the internal pressure causes the soft, flexible material to expand into a functional airfoil profile, allowing it to maintain its shape during flight. This design, invented by Domina Jalbert in the 1960s, is inherently stable and does not require a tail for balance.123