TBP recommends at least 4 pieces of Fatwood in your fire kit. These are to help replenish your kit and keep a piece of your 10 essentials ready to go!
 
A resin-impregnated heartwood from pine trees, fatwood is prized for use as kindling in starting fires. Thanks to the the flammability of terpene, it lights quickly even when wet, is very wind resistant, and can burn hot enough to light larger pieces of wood. A perfect addition to any fire kit and light enough to carry in your day pack.