Safety & non-toxic This collar removes insects such as fleas and mosquitoes by immersing them for several months with plant extract. It is safe for pets and humans. Waterproof & Lightweight This collar, which removes this fleece, is waterproof design and it is not necessary to remove the collar when the pet is taking a bath. Besides, it is light and it is not a burden on dogs and cats. Adjustable This collar can be adjusted by the size of your love pet. If it is too long, you can cut the extra length.