JumpLeggings

Pressing the jump key a second time in mid-air triggers a second jump, which gives extra height and distance for reaching higher ledges and new areas. Each activation plays a smooth 3D animation, and the jump is marked by pistons extending as visual feedback. The leggings count as 5.0 equivalent iron leggings and last for 200 uses, so the double jump is tied to a limited item rather than being free.

The mod suits exploration and parkour, where extra height helps with routes that vanilla jumping cannot clear. The crafting recipe becomes available automatically once the ingredients are obtained, so players can reach the leggings without a separate advancement path. The leggings also serve as a regular armor piece with iron-level protection. Files are published for Fabric only, and the environment is client and server, so the server and every player need the mod. The mod is released under the Creative Commons Attribution Non Commercial Share Alike 4.0 license and is not open source.

Installation requires the Fabric loader, and the mod has a single file for Minecraft 1.21.10, dated 2025-11-30. Among the 2685 Adventure mods with Fabric files for 1.21.10, JumpLeggings is one of the lighter options in terms of mechanics.