100% polyester. Easy to cut and can be applied to upholstery,seating,home decor or school projects. Function 1 - Wrapped around the foam core of the sofa cushions to reduce friction between the core and the fabric,reducing wear and tear on the fabric. Function 2 - The elasticity of the wadding helps to maintain the shape of the fabric,preventing it from stretching out of shape with use. Function 3 - Fill your furniture,cushions,cushions,etc. to make them more beautiful and full..