Description :

Solder wick, coffee, and paper towels keep SparkFun running. You can steal someone’s diagonal cutters for a minute, but you’d better ask before touching their solder wick.

Solder wick is composed of copper threads braided together. Flux is normally added to help the solder flow from where it is not supposed to be (the jumper) to the wick. Hence, solder wick is sometimes called desolder braid.
This wick is 0.055″ (size #2) wide and 5ft long.