Precious Cat Dr. Elsey's Senior Cat Litter, 8 lbs. 100% Bio-degradable Non Toxic biodegradable Silica Gel Crystals with Natural Herbal attractant to bring Cats into the litter box Silica Crystals wicks moisture away from Cats Hair to keep them clean Use in Mechanical Amorphous Silica Gel Hydrolyzed herbal attractant Safe if inhaled or ingested Solutions booklet attacthed Helps prevent urinary infections