The Keeper EPDM rubber compound takes rubber straps to the next level of strength and durability. Unlike most competitors' straps constructed from inferior rubber, these straps won’t crack, rot or lose rebound qualities with repeated use. It features quality rubber that remains non-brittle in temperatures as low as -40°F, high temperature or demanding elements and can be used year-round. Zinc-plated, steel hooks resist corrosion and do not bend, break or rust as easily; making Keeper EPDM Rubber Straps the best choice when it comes to your securing your valuables.