Backpack

are items that expand a player's carrying capacity.

Use
Backpacks have 9 Docks, so they are able to carry up to 9 different Items. However, attaching the to the player's back uses a Dock, so a  effectively increases carrying capacity by 8 Docks. The can be attached by grabbing it and reaching behind the Player's back, then letting go of it. The can be retrieved from the Player's back by placing their hand behind their back and grabbing it.

Obtaining
s can be obtained in a number of ways:
 * s can be found in the Overworld where a Crate or Chest is present.
 * In the Town Hall, it is possible to sacrifice ten Log Wedges, ten Stone and five Copper Ingots. However, this feature is only for alpha testing and will eventually go away.
 * As of 0.0.9.1 s are not craftable