Players can use Double Jump after passing the trial in Mount Fay, but it'll be one of the hardest tasks in Hollow Knight: Silksong.

Silksong's Double Jump ability, otherwise known as the Faydown Cloak, isn't available until far into your adventure, so ...

You can unlock the Hollow Knight Silksong Wall Jump, known as the Cling Grip, by heading deep into the Shellwood area and ...