Vet's Best Mosquito Repellent Spray (8 oz) uses nature's most powerful plant extracts with a unique blend of Lemongrass Oil and Geraniol (from Citronella plants) which was carefully formulated to repel mosquitoes. For over 30 years, Vet’s Best has blended plant-based ingredients that work together to comfort and protect your pet. Our products are a plant-based alternative to traditional chemicals and can be used year-round. For added Mosquito protection, try Vet's Best Flea and Tick Yard & Kennel Spray that kills mosquitoes in outdoor spaces.