Simple mod that give you a Slowdown 4 effect (-75% movement speed), whenever you have more than one backpack of any type in your inventory, on the back or anywhere else. It also applies to any entity you are riding (horses etc.), although it doesn't currently work for custom vehicles that may use different movement mechanics.
Please issue a ticket on github, if you wish for me to make it for example for 1.20.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Ships as fairsophisticatedbackpacks-1.0.0.jar — drop this file into the mods folder
- Download size: 12 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.