Naturally Effective Plant-Based Formula: Featuring 100% plant-based insecticidal compounds as active ingredients, this flea and tick collar provides natural, safe, and effective protection for dogs and cats without the use of DEET or pyrethroids. Built-in Lasting Protection: Made from non-allergenic, soft thermoplastic rubber, the collar integrates natural active ingredients directly into the material during the polymerization process. These ingredients are slowly released over time, offering continuous 24/7 protection for cats and dogs. Flexible & Adjustable to Fit All Pets: Designed to fit pets of all sizes and breeds, the collar features an adjustable length of up to 25.59 inches (65 cm), suitable for kittens, small cats, large dogs, and everything in between. Simply adjust to fit, fasten securely, and trim any excess length. Easy and Comfortable to Wear: Lightweight and ergonomically designed, the collar ensures pets wear it comfortably with no added weight or irritation. Adjust to allow space for two fingers between the collar and your pet's neck for optimal comfort. All-Weather & Waterproof: The collar’s construction ensures the active ingredients remain effective regardless of weather conditions. It is fully waterproof and maintains performance during swimming, bathing, or rainy outdoor activities, providing reliable protection at all times.