Birch tree bark. Lightweight and flamable [sic], this bark can be used as tinder.
In-game description

Birch bark is a type of material used for tinder.

Overview Edit

Birch bark fills the role of tinder, which is required to start a fire.

Birch bark is as light as any other tinder, weighing a mere 0.05 per unit. It is functionally identical to tinder plugs and differs only by name, visuals and method of obtainment.

Fire Starting
Starters Cardboard matchesFirestrikerMagnifying lensWood matches
Tinder Birch barkCat tail headTinder plugCashNewsprintNewsprint rollStack of papers
Fuel BookCedar firewoodCoalFir firewoodFirelogReclaimed woodStick
Accelerant AccelerantLantern fuel