Hello there! Giving your sofa a second life by restuffing the cushions is a fantastic project that can make your couch feel brand new. The provided search results didn't contain specific instructions on this topic, but I can certainly help you with that!
First, you'll need to figure out what you're working with. Most sofa cushions have a zipper that makes this job much easier. If yours are sewn shut, you'll need a seam ripper to carefully open a seam along the back or bottom edge. Once you have access, take out the old, compressed filling. This gives you a chance to measure the cushion cover or the old insert to determine the size of your new filling.
Next, it's time to choose your new stuffing. For a firm and supportive feel, high-density foam is the best choice. You can often get it cut to your exact measurements at a fabric or upholstery store. A popular and very comfortable option is to wrap this foam core with a layer or two of polyester batting or fiberfill. This softens the hard edges of the foam and gives the cushion a fuller, more plush look. If you prefer a softer, sink-in feel, you can use loose polyester fiberfill on its own, though it may need more frequent fluffing.
Once you have your new filling, the trickiest part can be getting it back into the cover. For a foam insert, a great technique is to fold it in half, almost like a taco, and slide it into the cover. Once it's inside, you can work it into the corners and let it expand to fill the space. If you're using loose fill, just stuff it in, making sure to push it firmly into all the corners for a smooth, even finish. After the cushion is full, simply zip it closed or sew the seam shut using a needle and a strong, matching thread. With a little fluffing, your cushions will be comfy and plump once again
