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This mod combines Sophisticated Backpacks and Traveler's Backpacks. Sophisticated backpacks can have textures of special Traveler's Backpacks, and have the corresponding backpack abilities.
You may craft a Sophisticated Backpack with a non-standard Traveler's Backpack. The Traveler's special appearance and abilities would be transferred to the Sophisticated Backpack. The Traveler's Backpack would transform into a standard one with inventory retained. It can be undone by crafting a standard Traveler's Backpack with the Sophisticated Backpack.

The combined backpacks can have their corresponding Traveler's abilities. This includes potion effects, extra attribute modifiers, and some special world interaction, such as rain collecting of the Cactus and water absorption of the Sponge.
Traveler's Hose can now link to tank upgrades of Sophisticated Backpacks.

Sophisticated backpacks get a sleeping bag button when there's a sleeping bag in its storage. Basically, it functions just like the sleeping bag button from the Traveler's Backpack.