Amazon.com: TigeJoy Heavy Duty Sofa Cushion Support Board for Sagging Couches, Thick Solid Wood Boards Add Strong Seat Supports, 20.5''W x 45" L for Loveseat, Replacement Stuffing Under Couches Sofa Saver : Home & Kitchen

So much better than those plastic supports for sagging couches. The couch feels so much firmer and supportive. Fit perfectly. Wish i had purchased it sooner.

It does prevent sag, not as firm as I would like. Need a thicker one & need to return

Like most reviews this will more then likely ( high chance) work for your couch/loveseat but I guess it depends on your couch/loveseat. Why replace a couch/loveseat that's in good shape except for the annoying cushion sag? It is the prefect fit for ours and we immediately felt the difference. We did not sink in as usual. Don't know the durability in the long run yet of course since we just bought it but it feels durable. Total life saver for us since loveseats run like 2 grand on average. Even though i have a 2 cushion love seat I still measured because you never know. Buy it and try it out. I am so glad I did.

I brought this and was a lil scared it would not work but it did the length is okay wish it was just an inch longer and the width is okay but I truly truly wish the width was more but other than that it works and I can tell the difference and I'm so happy

Works great. Exactly what we needdd to keep our sofa sturdy and comfortable