Unique volatile pyrethroids and a method for repelling and/or killing insects involving treating an object or area with an insect repelling effective amount or insect killing effective amount of at least one unique volatile pyrethroid and optionally a carrier. Also a method for repelling and/or killing insects involving treating an object or area with an insect repelling effective amount or insect killing effective amount of at least one compound selected from bioresmethrin, D-allethrin, ethofenprox, prallethrin, transfluthrin, permethrin, and mixtures thereof, and optionally a carrier; wherein the object or area is clothing or items attached to clothing.