Flax is a type of fiber that can be made into thread. It is obtained from the stem of the FLAX plant, which is an annual herbaceous plant that is grown for its fibers and seeds. The fibers are then spun into thread, which is used in a variety of applications such as weaving, knitting, and embroidery. FLAX thread is known for its strength and durability, making it a popular choice for many textile projects.