Glider Add-on 1.21+

Using the mod Glider unlocks new possibilities when exploring heights in Minecraft PE. The add-on introduces a glider that can be activated right in the air and lets you control your falling speed. Its limited durability makes you keep an eye on the item's condition and not rely on it thoughtlessly.

You can open and close the glider at any time by using the jump button.

The crafting recipe is quite cheap.