Made through a unique process that explodes the special blend of 100% polyester fibers and creates an extraordinary resilience that maintains its integrity through laundering, Poly-Fil has smooth consistency, is hypoallergenic and unconditionally guaranteed. It can be used in all sorts of projects including cloudscapes in the classroom, arts and crafts with the kids and holiday décor and play scenery. Details: 20 lb. box size No added chemicals or flame retardants Hypoallergenic Superior resiliency and smooth consistency 100% polyester Care: Machine wash on gentle with warm water. Air dry or tumble dry on air or low heat setting. Fiber may shift during laundering, gently massage the project with fingertips to move the fiber back into place.