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Limited time! Get a $50 statement credit when you open an account & use it to make $30 in eligible Sam’s Club purchases within 30 days.¹

¹Offer subject to credit approval. During the offer period, new accounts that qualify will earn a $50 statement credit instead of a $30 statement credit that you may see otherwise advertised. To qualify, you must (i) apply and be approved for a Sam’s Club credit card account between June 24, 2026—July 7, 2026 and (ii) use your new account to make Sam’s Club purchases totaling $30 or more (excluding cash advances, gift card sales, alcohol, tobacco and pharmacy purchases) within 30 days of date of account opening. When you open an account online or with your mobile device, purchases cannot be made at in-club registers until the physical card is received. Your physical card should arrive in 7–10 business days from date of account opening. A $50 credit will post to the account within 90 days after the qualifying purchases are made. Offer is valid for newly opened accounts only and each account is eligible for only one $50 offer, in lieu of, and not in addition to, any advertised $30 offer.

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ZINUS Night Therapy Quick Assembly Smart Box Spring

As the backbone for solid mattress support, a box spring that falls short can make or break your night’s sleep. Paired with your favorite bed frame, the steel ZINUS Night Therapy Smart BoxSpring® will optimally support any foam, latex or spring mattress. And our quick assembly version will give you total confidence when it comes to setup, as it requires fewer bolts than before, plus all the tools and step-by-step instructions you’ll need to get the job done. Push-pin locking brackets easily click into place so you can connect the pieces and finish assembly in less than an hour. So you can start snoozing better, sooner! We developed the ZINUS Night Therapy Smart BoxSpring® with unbeatable durability and rock-solid stability to keep your mattress in shape for years to come. Its strong and durable steel frame and slats are made to support your mattress with no sagging or bowing. The entire box spring is wrapped in a versatile, textured white cover that slips right on, giving your finished bed a clean and crisp look. Simply place it on top of your existing bed frame, add your mattress and relax! Our Smart BoxSpring® is available in twin, twin XL, full, queen, king, and Cal king sizes to accommodate any bedroom. It’s efficiently packed into one compact shipping box that comes right to your door, so you can easily maneuver it through hallways and doorways and into the bedroom for setup. A 5-year worry-free manufacturer’s warranty against any defects in workmanship or materials is also included with your purchase. So you can rest well knowing we’ve got your back! The ZINUS Night Therapy Smart BoxSpring® with Quick Assembly offers you a strong, supportive mattress foundation with hassle-free setup and delivery. Box springs don’t get much better than this!

Bed Size

Brand

<ul> <li>Available in 3 different heights including: 5 Inch, 7 Inch and 9 Inch</li> <li>Available in twin, twin XL, full, queen, king and California king</li> <li>Easier-than-ever assembly requires only a few steps and less than an hour</li> <li>Ultra durable steel framework supports any mattress</li> <li>Efficiently packaged in a compact box that ships to your door</li> </ul>

Specifications

<ul>
<li>Available in 3 different heights including: 5 Inch, 7 Inch and 9 Inch</li>
<li>Available in twin, twin XL, full, queen, king and California king</li>
<li>Easier-than-ever assembly requires only a few steps and less than an hour</li>
<li>Ultra durable steel framework supports any mattress</li>
<li>Efficiently packaged in a compact box that ships to your door</li>
</ul>

Size

Twin

Twin-XL

Full

Queen

King

California King

Variant Height

This box spring is delivered in a box and needs to be assembled. With the included tools and instructions, I assembly it myself in about 1.5 hours. It wasn't difficult at all! And it included a heavy cover that zippers on and fits very well. Once I got the whole bed back together, I found the box spring to be very sturdy and solid. No creaking noises. It also makes the mattress feel a little more firm, which is fine with us. So far, we are very pleased with it.

Great quality

It was easy to assemble. Came in a box with the cover. Looks good and the height was perfect.

Box spring purchased.

Fast shipping and easy assembly. We were worried that this would not compare to our conventional boxspring. It is sturdy, works great (no squeaks) and is much easier to handle when moving around.

Change is good...

I love it

This item will be delivered in a small box, so don't be alarmed.  Assembly is required, but is easy! This is a metal frame box covered in fabric.  It is not a "spring" by any means, but then again neither are the wooden ones ;) This is very sturdy and quiet and also a great value.  I haven't had to move it from my home, but I imagine that would be pretty easy as well.

Nice!

Got this for my grand daughter who is moving up to a twin mattress with box spring. I had not idea it would have to be assembled. However, my son in law put it together and it looked fine. Zinus has good reviews which is why I ventured out to get it

"Smart" Box Spring

Easy enough to assemble. Two of the locking pins were broken when removed from the box, the bottom pins on two sides.  I went ahead and assembled it without these to lock it in. Just hope it stays together.

Two Pins Broken

The picture shows peg legs and they are not included. This needs to be stated. Otherwise it is simple to put together. Very light weight but sturdy. I was going to order a similar one on Amazon that has legs but I like that this one has a cover but I did need the legs.

Deceiving Picture

We bought this about a month and a half ago. All pieces included. We had two issues with this product: one of the pieces didn't align flush with the other when screwed in, so it was slightly off in it's alignment. Also, we had major issues trying to get the zipper case around it, and it never fully closed, the zipper and material began ripping (and we tried it several different ways). We had just moved and really needed our bed set up, so we decided to try it. It works ok, but we are definitely not fully satisfied with it.

We have purchased something similar to this before from Sam's but this time it was a total let down. It was easy to put together, but we struggled for almost an hour trying to zip up the cover around the frame. We tried it inverted and then the opposite way and nothing worked. It was so obvious the cover didn't fit. The zipper finally busted when we were halfway around. You can see in the photos where the cover had been stretched so much it was starting to tear. fast forward to us just trying to rig it and use it with the cover unzipped and it looks like the box spring is smaller than our king size mattress  we also purchased from Sam's! How is that possible, I bought a king mattress and a king box spring--? Everything that could have gone wrong , did. So disappointed.

Really wanted to love this

ZINUS Night Therapy Quick Assembly Smart Box Spring

Shipping

Highlights

ZINUS Night Therapy SmartBase Tool-Free Assembly Mattress Foundation