Linen fiber is a natural fiber made from the stem of the FLAX plant. It is one of the oldest known fibers, having been used for thousands of years to make fabric and other textiles. Linen fiber is strong, durable, and absorbent, making it an ideal material for clothing, bedding, and other household items. It is also highly resistant to wrinkles and shrinkage, making it a popular choice for upholstery and drapery.