Quickly and effectively protects dogs from fleas and ticks. The active ingredient in ShieldTec Flea & Tick Collar controls fleas on contact – they don’t have to bite your dog to die. It also kills ticks, including Brown dog tick, American dog tick, and deer ticks, which may carry Lyme disease. The odorless collar is specially formulated using insecticide release technology which works with the natural oils in your dog’s skin to distribute the active ingredients over the dog’s body. Water Resistant – Allows for Bathing & Swimming. Fast, Effective Protection at a Better Value. Kills Adult Fleas, Preventing New Flea Infestations. Fit-Right Design – Fits Any Dog Size. The collar should be worn continuously. Reapply a new collar every six months. For use on dogs and puppies 12 weeks and over.