Naturally Effective Plant-Based Formula: Using 100% plant-based insecticidal compounds as active ingredients, without containing 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. The natural active ingredients are integrated into the collar material during the polymer melt process and are slowly released over time, providing continuous protection for cats and dogs. Flexible & Adjustable to Fit All Pets: This flea collar is designed to fit all pets. With an adjustable length of 25.59 inches (65 cm), it can be used on both dogs and cats of all ages and sizes, from a 3-month-old kitten to a large breed dog. Simply fasten the collar and trim any excess length. Easy and Comfortable to Wear: Fasten the collar around your pet's neck, ensuring enough room for two fingers, then cut off the extra length. The collar is lightweight, so your pet will not feel any discomfort while wearing it. All-Weather & Waterproof: Since the active ingredients are embedded within the collar material, it remains effective in all weather conditions and is waterproof. The collar maintains its performance even when exposed to water, allowing your pet to stay protected during baths, swimming, or rainy conditions.