Walk downwind keeping the wing above your head.
What keeps your wing flying is airspeed, so keep an eye on it.
Different wind conditions have a big effect on difficulty.
Success: walk 20 meters
Wing: Ozone | Firefly 2 | 16m2
Wind: 35km/h | mild turbulence | mild lift
Speedwing on a windy day
Wing: Apco | Karma SP | 22m2
Wind: 25km/h | no turbulence | no lift
Wing: | | m2
Wind: km/h | turbulence | lift