The backpacks mod allows players to make backpacks to keep their items in on the go. Think of it like a portable chest that you can fill with items and it'll only take one item slot in your inventory. There are many different backpacks you can craft and each one does something unique. You can use dye to switch the color of a backpack and you can also change the name and size of any backpack you have already crafted.
Backpacks are crafted with 7 leather and a gold pressure plate.
Backpack pouches are crafted with 5 leather and 3 string on the right.
Backpack restorers are crafted with 7 gold, a gold pressure plate and an eye of ender in the middle.
Quantum chests are crafted with 1 block of obsidian in the middle, 4 diamonds in the corners and 4 ender eyes on the sides.