Fiber Fuel is an all natural, compressed wood brick manufactured exclusively of kiln dried, compressed Eastern White Pine chips and sawdust. Because the bricks are made from 100% kiln dried wood waste, there is much less moisture to cause improper combustion. This then lessens the risk of creosote build up in chimneys and ultimately means less risk of chimney fires. Use to replace or complement standard firewood. Perfect for all wood stoves and furnaces and ideal for campfires and backyard fire pits.