Wool and polyviscose kilts differ primarily in material composition, weight, feel, and maintenance, with wool kilts made from natural fibers and polyviscose kilts made from a polyester and viscose blend. Wool provides a heavier, more structured feel and is better at holding sharp pleats, making it the standard for traditional and formal kilts, while polyviscose is typically lighter, easier to care for, and more resistant to wrinkles. Wool also offers a more natural texture and breathability, whereas polyviscose provides durability and consistency at a lower cost. The choice between the two depends on intended use, preference for feel and appearance, and how much maintenance is desired.