This is fine. It will stabilize the cushion on my daybed. It is not even close to 1" thick. I wanted to raise my cushion a bit to cover the seams on the frame, so I was particular about the thickness, and this does not accomplish that. I wish Wayfair would post accurate measurements.

This was very easy to put together and on the bed. There is Velcro in each corner and the middle to secure it to the frame. I am hoping this will greatly help the bed be more stable and firm giving her more support.

This mattress support is definitely very necessary, my mattress was deforming and it didnt really feel comfortable. I placed this support on it and it feels firm, comfortable. It is of excellent quality, they can be cleaned very easily. It is just to place it on the bed and it comes with some ties to secure it to the structure of the bed so that it does not move. 10 of 10.

Perfect add to a bed if you are trying to avoid a box spring. Adds stability, making it a must have if you are trying to just use a thick mattress.

This is great to add to any platform bed that has slats only. Slept great with full memory foam mattress.