The Odor Rescue - RV/Marine/Big Rig boasts a patented delivery system that harnesses the power of Chlorine Dioxide, making it the most effective odor removal product available. Unlike masking agents, DeODOR PRO products offer unmatched air purification without relying on toxic chemicals. With no need for chemical contact and no residue left behind, this product eliminates odors from smoke, tobacco, mold, mildew, pets, skunks, food, vomit, urine, plastics, VOCs, and other sources.