Greaton, Wooden King Bed Slats for Support Under Mattress with Cover – Replacement Wood Slats for King Size Bed Frame – Under Mattress Support Without Extra Height – 3.38-Inch Standard Width

This is exactly what we needed for our son's bed. We had wood boards across the frame under the mattress, but they never stayed in place, especially with kids jumping all over it. This set supports everything perfectly and even fixed the sagging at the end of the bed. I honestly do not know why we waited so long to buy this. The covered wood slats keep everything from shifting and give the mattress a smooth, even base. They do not add any height, which is great for tall mattresses or platform beds. The airflow is noticeably better too, since the gaps allow heat and moisture to escape. We still put the other boards we were using across the top of this to add extra strength, because, well, kids. It all works together really well and feels solid. Installation could not be easier. They come bundled, no tools needed, and lay right on the frame. The quality is excellent, just make sure to measure your frame before ordering. Highly recommend if you need a simple, sturdy upgrade for your bed.

If your mattress feels saggy or you wake up with a stiff back, try this before investing in a $X,000 mattress! This completely changed my bed, which didn't have enough slats to be a "true" platform bed, and fully supports my king-sized mattress. It fits perfectly from end-to-end and side-to-side. It was super easy to install, two of them velcro together in the center, and they disappear entirely even though my side rails don't have a lot of vertical space.

We had recently changed over our sons bed from a crib to a full size toddler bed. The conversion kit from the original frame only provided 3 slats to hold the mattress. The caused some issues when my wife or I would lay down to read to him. We ordered these slats as a quick and easy fix to the bed to keep from us sinking into the bed. It was everything we were hoping it would be. It was easy to set up and so far the quality has been great. It's firm enough to where it hold my wife and I both(I'm 6'1 approx 220lbs), plus the kids.

No issues. Sturdy and works as required.

Product in gerenal seems quality, but beware if you're purchasing this product to meet a specific mattress warranty requirement. Product details stated that the heavy duty has 4.5in between slats. We're measuring 5" minimum and because the slats can slide some within the fabric pockets, it can be up to 5.5". now we have to take the trouble to repackage and return, when that could've been avoided with accurate product information. Also not sure why the slats are manufactured to be 78" (across all queen vertical options with this brand) when standard queen mattresses are 80"? We had already had to compromise there since the alternative products that were 80" didn't meet our slat spacing requirement. The horizontal slats from this same brand we purchased for a different bed were accurate slat spacing to their product informaiton.

Adding the extra slant boards helps with the mattress not pushing through. Especially the roll up mattress that are popular right now.

Not very sturdy for a king size bed. No middle support.

My elderly parent's bed had to be lowered as it was becoming a very unsafe issue (dad had already fallen); they didn't want to get rid of their mattress or their bed frame. This was the perfect solution as we were able to lower their bed by 5" just be removing the boxspring. It came faster than expected, is a very fair price, and is of good quality. We could not be happier!