It depends what the pillow is stuffed with.
Restuff leather couch. There should be a zipper in the back of the cushions just unzip and start stuffing the polyester filling in until you think its. So I get the Polyfil like stuffing at Walmart and re stuff it when it gets flat. Take the old foam out of the cases and dispose of them appropriately.
Leather cushions can be a beautiful addition to your home and couch. This leather tub is part of a sofa. FYI sometimes cushions sometimes are hard to stuff a trick is to put the foam in a thin plastic bag suck the air out with a vacuum then insert in the cover and tear out bag and close zipper.
Be aware the old foam will come out much easier than the new foam will go in it has broken down thats why you are replacing it. Add life and comfort to your sagging and broken down cushions with foam replacements and re-stuffing. Leather casings often have a hidden zipper.
Replacing the filler in the cushions is an effective way to rejuvenate the piece. See the before and after photos below. Check tags on the couch for washing care instructions.
Boosters are what we mostly use on Fixed Seat Cushions which are mostly found on Leather sofas. At 30 to 60 per yard leather costs around the same as other upholstery fabrics. Foam replacement and restuffing sofa cushions is available to add suspension support to your seating.
In most cases Natuzzi sofas have a warranty depending on the seller that will allow cushions to be restuffed and fabric or leather replaced if the product shows excessive wear through normal use. Contact the furniture store where you purchased the sofa if you feel the sofa is defective and the cushions are worn due to regular use. Restuffing Leather Couch Cushions and Foam Replacement By ReLeather.