Your pets are family, and PetArmor® helps you confidently care for your dogs—especially when it comes to flea and tick control. PetArmor® collars conveniently provide quality, head-to-tail protection without the expense of a vet visit. Each one-size-fits-all dog collar kills fleas and ticks for up to 6 months. This flea and tick treatment for dogs kills adult fleas before they can lay eggs, helping to prevent flea infestations.