Plant-based. Made with 100% balsam fir oil. Lab proven most effective. Biodegradable. Repellent: 30 days effective. Freshener: 90 days effective. Freshens the air and repels rodents in enclosed storage areas including: RV's, campers, boat, cars, etc. The mouse pouch repels by releasing an odor that is offensive to rodents, but not offensive to humans. Use in non-living areas (attics, basements, cellars, storage areas, garages, shed, pantries and barns). Place one scent pouch per 8 sq. ft. in areas to be protected (i.e., use 4 pouches in a single car garage or one pouch in a pantry). Replace when scent has diminished. Length of effectiveness depends on air exchange rates and temperature. "No poison, just results". 4/pack. Made in the U.S.A.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov