All natural. Burns hotter & longer. Central Market All Natural Mesquite Lump Charcoal goes through a unique process that rids the wood of most unwanted foreign materials including resins and acids which are so commonly found in briquettes. What remains is only coke and natural fiber, accounting for the subtle, natural mesquite flavor that food capture with cooked with Central Market All Natural Mesquite Lump Charcoal making this an expert’s choice for outdoor grilling. 100% pure mesquite lump charcoal. No chemical additives or fillers. Product of Argentina.