Thread Magic Thread Conditioner is a unique, completely safe chemical compound. Thread Magic helps the thread move through the material with far less drag than uncoated thread. Beeswax creates a sticky coating while this makes a slick coating that works more like ball bearings. Works especially well on metallics, silks, and rayon threads to make them more pliable and easier to use. Thread Magic is chemically inert and will not react with the fibers. Blister packed. Made in the USA.