The parasitic stop anti-parasitic necklace protects your pet for 2 months against parasites. It mechanically immobilizes fleas, ticks, mites, lice and other external parasites. Formulated with dimethicone -based and without chemical insecticides, dimethicone is gradually released and spreads on the coat and the skin. This blocks the joints of parasitities and makes them motionless. This product is water resistant, ensuring its effectiveness even after washing. Comfortably tie the necklace around your animal's neck and cut the excess. Replace the necklace after 2 months at the latest.