40 LB, Safe T Sorb, Premium Calcined Clay All Purpose Absorbent Designed For The Quick Clean Up Of Water, Oil, & Grease, Made Of Montmorillonite Clay, A Naturally Occurring Mineral With Superior Absorptive Ability, Is Environmentally Friendly, 100% Natural Mineral & Is A Coarse Granulation, Leak Resistant & Moisture Resistant Poly Bag.