The most effective way to eliminate and prevent mold and mildew odor and other foul smells from forming year round. Controlled release allows it to remain effective for up to 3 months, keeping enclosed areas odor-free, crisp and clean smelling. EPA registered chlorine dioxide technology. Each patented CLO2 generator pouch treats an area 1000 cubic feet in size safely and effectively. Not an air freshener or cover-up; eliminates mold and mildew odor. Contains 1-10g pouch - Net. Wt. 0.35 oz. (10 Grams).