The Parasite Stop flea and tick collar protects your pet from parasites for two months. It mechanically immobilizes fleas, ticks, mites, lice, and other external parasites. Formulated with dimethicone and free of chemical insecticides, the dimethicone is released gradually and spreads over the fur and skin. This blocks the joints of the parasites, rendering them immobile. This product is water-resistant, ensuring its effectiveness even after washing. Securely fasten the collar around your pet's neck and trim any excess. Replace the collar after two months.