Step 1: Step 1
Pick up polyester filling-stuffed pillows and hit them with one hand while holding them with the other. Hold the corners of the pillow and beat it against a firm surface several times, then rotate the pillow and hold the corners of the other end. Continue to plump the pillow by turning it over and around and beating it against the surface.
Step 2: Step 2
Remove the pillow from the cover, if it has one.
Step 3: Step 3
Place the pillow in a dryer with three tennis balls. Dry the pillow on a no-heat cycle for 15 minutes. The tennis balls hitting the pillow as it tumbles can help plump the filling.
Step 4: Step 4
Hold both sides of the pillow, grabbing some of the filling along with the outer fabric. Pull the sides of the pillow in opposite directions. Grab the pillow in several spots and continue pulling to plump the polyester filling.
Step 5: Step 5
Add more filling if the above techniques don't work. Use a thread ripper to open one of the seams, stuff more polyester filling inside until the pillow is as plump as you want it, then hand-sew the seam closed again.
Step 6: Step 6
Plump polyester-filled comforters by holding them at both corners of one end and shaking the comforter across the bed several times. Grab the other end of the comforter and do the same, then turn the comforter over and repeat the process.