Plant linen is a type of fabric made from the fibers of the FLAX plant. FLAX, which has four letters, is an annual herbaceous plant that is grown for its fiber and seeds. The fibers of the FLAX plant are spun into linen yarn, which is then woven into fabric. Plant linen is known for its strength and durability, as well as its softness and breathability. It is often used to make clothing, bedding, and other household items.