Repels and kills ticks and mosquitoes. Effective for 2 weeks when applied to clothing according to instructions. Field tested and approved for use by the TVA and U.S. Armed Forces. Duranon is the commercial version of the tick killer used by the U.S. in Operation Desert Storm. Contains .5% permethrin, odorless after application, nonstaining. NOTE: ORMD item - Cannot be shipped via any air service.