The Willowwarm Briquettes provide an efficient and sustainable source of heat, burning hotter and cleaner than traditional firewood, with minimal ash. As a carbon-neutral fuel, they make an ideal choice for environmentally conscious consumers. Our premium willow briquettes are made from a blend of 100% renewable, Irish-grown willow and biomass, with zero additives, artificial ignition ingredients or binders included. They have low moisture content (less than 10%) and produce powerful heat with a long, clean burn. They also have low ash content (less than 3%). Suitable for open fires, stoves and chiminea. Each pack contains approximately 10 briquettes. EPA Registration Number F0061-01.