Naturally effective plant-based formula: Using 100% plant-based insecticidal compounds as active ingredients, without DEET or pyrethroids, this flea and tick collar helps protect dogs and cats from biting insects naturally, safely, and effectively. Built-in lasting protection: The flea and tick collar is made with non-allergenic soft thermoplastic rubber. Natural active ingredients are integrated into the collar material during the polymer melt process and slowly released over time, providing continuous 24/7 protection for cats and dogs. Flexible and adjustable to fit all pets: Designed to fit all sizes, the collar adjusts up to 25.59 inches (65 cm), making it suitable for both dogs and cats of all ages and sizes, from kittens to large breeds. Simply fasten and trim any excess length. Easy and comfortable to wear: Secure the collar around your pet’s neck, ensuring enough room for two fingers, then cut off any extra length. Lightweight design ensures pets won’t feel any added weight. All-weather and waterproof: Since the active ingredients are embedded within the material, the collar remains effective in all weather conditions and is fully waterproof. Protection continues during swimming, bathing, or rainy playtime.