Personally, acrylic fiber and spandex are both synthetic fibers, but their properties, uses and prices are different. Acrylic fiber is called "synthetic wool", which is soft, warm and bright in color, but it has poor hygroscopicity, easy staining and poor wear resistance. Spandex has good elasticity, weather resistance and chemical resistance, and is often blended with other fabrics to improve elasticity, but it is easy to decolorize, has poor heat resistance and is prone to static electricity. When washing, acrylic fiber is recommended to be washed by hand, and spandex can be washed by machine. The choice depends on the specific needs and uses.