GIONAR 50 x 50cm Sofa Cushion Support, Sofa Repair Foam, Furniture Seat Support,High-Density Sag Repair Replacement for Sofa Couch Loveseat Chair

This is a good size and firm foam. It comes vacuum sealed and takes a while to puff back out.Once it has it’s not overly thick. You can certainly feel it stop some sinking but it’s doesn’t prevent it completely. But that isn’t the aim. It’s a repair, not a replacement part. It will keep you going until you change couch. I can feel the difference and it’s worth that quality of life improvement

This is actually just a piece of 3 cm low density, cheapest foam. Nothing like the photo, it’s flat, and no density whatsoever.Typical Amazon garbage allowed to misrepresent itself without consequences.Don’t even think of buying it.

The foam has no structure, placed it underneath the sofa cushion and it was the same. Useless

GIONAR 50 x 50cm Sofa Cushion Support-Sofa Repair Foam. (Black)The foam is slightly dome shaped and comes in a tightly packed roll.I have a saggy cushion in my sofa which can’t be turned around due to its odd tear-shape design. So when I saw this item I was excited to try it out.The foam came vacuum packed so did need a bit of time to allow for full re-expansion. I placed it under the sofa cushion where it sags the most and it helped reduce the sag immediately. It hasn’t gone completely, so perhaps a slightly thicker foam support might be needed, but it is a good start.