ZINUS 7 Inch Metal Smart Box Spring/Mattress Foundation/Strong Metal Frame/Easy Assembly, California King

We have three of these mattress foundations at our cottage and they are great! Fairly easy to put together once you figure out the numbering system. Of course, constructing foundation numbers 2 and 3 was way easier to do once number 1 was done and the numbering system was clear to me. The foundation feels solid and there are no squeaky bits as you move around in the bed. Would buy again.

I am impressed with this box-spring. The quality of the build is excellent, and the craftsmanship impressed me. Years ago I delivered furniture, having put together many different types of furniture, beds etc. I have seen some alternative box-springs and whatnot, but this takes the cake. Unlike a traditional box-spring made with wood, this is not going to wear down over time and squeak due to the grip of the nails in the wood (a common issue with squeaking in construction). First, assembly took me about 20 minutes, and I didn't even need the instructions. I was able to put this together easily by myself and move it by myself as well.The parts are marked "up" conveniently where you might go astray in the build, and it stays together well enough before adding the bolts/nuts so that one person can do it alone, provided you do it on a flat surface such as the floor. I love that this boxspring can come apart too, if anyone needs to get it into a tight area (the worst part of a bed delivery, imo is the box-spring as it cannot bend/fold). I have gone from a two part box spring for a queen mattress down to this and it makes NO sound whatsoever. Craftsmanship is excellent, and the parts fit together like a glove. The "slats" are not attached by screws, rather just sitting in place, but they are wedged in place and do not move out of place. Only weak spot I thought of was having the zipper face down so that the zipper part of it sits on frame (thus possibly cracking the zipper or its mechanism) but the zipper comes toward the center of the box-spring far enough to clear the side boards of my bed, so I will have to see if the zipper takes damage over time from the downward pressure. Certainly not going to knock anything for that. Edit: Dec 1, 2017: This is still absolutely quiet and no squeaks at all over the past couple months. Really highly recommend this box spring to anyone looking for a lifelong keeper. Edit: July, 2019: Still a perfect boxspring! Edit: July 2024: Still a perfect boxspring!

I NEVER write a product review but always look at others when considering a product and felt compelled to provide one to Zinus because they simply deserve it. I searched all over town for a new full size box spring for my 10 year old son's convertible "crib to bed" as we had a great mattress but the boxspring was a bunkie board made of wood (1x 2's) and literally a flat piece of cardboard. Every time he turned in bed, jumped on bed, parents were in bed reading etc., the bed was the loudest bed I have ever heard and it finally drove me to insanity. My search began with the retail mattress stores as well as Costco (big fan!) etc. No one had them in stock and it would be deliverable in two weeks, couldn't tell me a price, horrible customer service and the list goes on and on. I got tired of the hunt and thought I'd try Amazon.com with zero expectations of even finding one. I quickly found several companies offering box springs and settled in on the options that Zinus offered and did my research. I chose the metal version and paid. two days later it was at my front door and twenty minutes later I had it put together and my son even assisted me. One box, makes ZERO noise, quick assembly, awesome support for mattress, perfect fit (I did measure his bed frame etc. prior to purchasing), lightweight but solid, incredibly strong, and only around $95.00 total. Kudos to Zinus for a fantastic product and know that my next box spring will be purchased from you!

This box spring was easy to put together with the help of someone else! You really just match up the numbers and then screw in the screws and bolts. You just got to know what you're doing. I've been sleeping on this box spring for a whole month now and it's been perfectly fine. No squeaks, no extra movement, and no issues so far! For me and my boyfriend the max weight being on this box spring is around 570 lbs and it's holding up. Read the fine print before ordering as I thought this also came with a frame, it does not. That was my fault. So currently the box spring is just on the floor with my mattress on top of it and there hasn't been any issues as of yet!

This is the only way to buy a box spring. This was so easy to assemble. The instructions make it totally simple. The parts are numbered, you lay it all out, and then literally start assembling in numerical order. The fitted cover slips on over the top and it is ready to put the mattress on. If I ever need a box spring or know someone that does I will recommend this assemble yourself box spring. It was fun to put together, great quality, sturdy. A cute little thing they do that is really smart - they include a thank you and a Hello you card that is blank inside so you can now use them to send onto someone. As they said they hate to be wasteful so they say hello you and thank you but the cards are there for you to use now. Yes - you still need a bed frame for under this box spring and a mattress for on top - I am including this comment because I have had people ask me! LOL I did not read on the slip on cover if it is washable but I would assume it is which is another bonus should you ever have an episode of critters or any other reason you may want to wash this - regular foundations do not offer that option. I bought this for an older gentleman and already put it at his house so can not read the label on the cover now. YES - I would recommend this to anyone