Polyvinyl alcohol (PVA) fibers are generally considered to be more expensive compared to other types of synthetic fibers like polyester or nylon. This is primarily due to the production process and the raw materials used. PVA fibers are made from polyvinyl alcohol, which is a water-soluble synthetic polymer. The manufacturing process involves extruding the polymer into fiber form and then chemically treating it to make it insoluble in water.

The production process and the specialized properties of PVA fibers, such as their water-solubility and biodegradability, contribute to their higher cost. Additionally, their applications are often in specific industries like textiles, construction, and concrete reinforcement, where their unique properties are valued.

However, prices can vary based on factors like production scale, availability of raw materials, technological advancements, and market demand.