By Adalheid Voigt. Sofa. At Friday, March 15th 2019, 04:53:07 AM.
Before you start, remove your jewelry, especially rings. I almost lost mine in the process! To give yourself room to work on the seat backs, remove all the seat cushions and set them in a clean workspace. Grab a large amount of Poly-fil and begin to shove it up inside the cushion, making sure to position it behind any foam or pillow that may already be in the cushion.
My mom was pretty positive there were no zippers to access the seat backs on her sofa, but after a little spelunking she was very surprised to find that, indeed, there were hidden zippers along the bottom back sides. If you can only get to the seat cushion, skip the Poly-fil and just pick up batting. For seat back access only: just Poly-fil.
Repeat this step with remaining seat cushions. Total cost for the Poly-fil and batting? Under $40. Not too shabby! For the seat cushions, I simply wrapped quilt batting around the entire seat and stuffed it back into the covers. Placing the fill behind the existing cushion will help to keep everything looking smooth. Pack the Poly-fil in like you're stuffing a turkey.