Imperius Foldable Box Spring, Bunkie Board, Bed Support Slats, Bed Boards for Under, Full 60 x 48 in

Fits a king bed perfectly and provides the exact support I was looking for. No assembly required, no noises. Because of the fabric elastic strip they have to fold them up and keep them together the bed doesn't slide around too much but you may need to add grip strips if your bed is on a flat base. But these boards are thin, yet very sturdy, and a good value. Be careful when you order though. I accidentally ordered the wrong size the first time.

Item was junk. Not suited for intended purpose. First it arrived with nothing ends of the box open and the item sliding out either end when attempting to carry it in. I ordered a full size board. It completely failed to cover the size of the bed frame and offered zero support for the mattress. Plus, it’s so cumbersome that returning it is not worth the hassle. Total waste of money.

Perfect fit, actually helps firm the mattress. Note, sets in middle does not fit end to end.

The planks are relatively thin, and at first, they didn’t seem strong enough to support the mattress. However, after using them for a month, I found they do an adequate job of keeping the mattress flat. The main issue is that they don’t fit a full-size mattress—they are too short and too narrow. As a result, I’ve had to lean my mattress against the wall for extra support.

Flimsy but adequate. Slats are asymmetrical!

I bought a memory foam mattress and could feel the metal bars of the bed frame through the mattress. I added this bunkie board and now I can sleep comfortably! Super awesome product that supports memory foam mattresses.

It is meant for a single/ chair mattress

I bought 2 twins for some bunkbeds. The boards are about 2 feet to narrow and about 2 and a half feet to short for the beds. The material seems flimsy and not connected very good. I feel like if i place it right in the middle of the mattress it might do a decent job at giving support to most the mattress. I do worry about the weight limit it would have for an adult, since they are so cheaply built. It was easy enough to unfold but doesnt stay in place since its to small for the area needed.