The ShengKou Flea and Tick Collar is an easy way to keep your pets protected from pests. The collar features two separate sections: one for dogs and one for cats. The cat section is available in two sizes: one for large cats and one for small cats. The collar uses advanced technology to refine essential plant oils into a PVC carrier to reduce chemical irritation. The collar is also waterproof so it’s perfect for use in any weather!