Kengro X is a proprietary blend of 100% natural cellulose fibers. It is sifted to minus 25 mesh for optimal solution to seepage and loss circulation problems. Kengro X also provides superior performance of removing stains from soil as well as rapid absorption of hydrocarbons. All natural: annual renewable resource - 100% Biodegradeable Non-fermenting Non-toxic: - No adverse effect on plants or animals Non-abrasive Non-corrosive Ultra absorbent: 7 plus times its weight BTU rating: (7500 BTU) Weight/bulk density: 8-9 lbs per cubic foot Particle size: fine minus 30 mesh Color: light brown Packaging: 25 lb. bags