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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 Preassembled Box Spring Foundation, Various Sizes

Instructions

<p>Set up your bedroom quicker and easier with this portable Zinus Night Therapy BiFold Box Spring Foundation. Ready to use straight out of the box, this mattress foundation unfolds and takes form, eliminating the need for tools. The size dimensions let you enjoy the space of a large mattress, while the folding design is easy to maneuver around hallways, up stairways and in narrow apartment blocks without scraping. This box spring foundation is also convenient to store.</p> <p>Made using heavy-gauge steel, this Zinus Night Therapy BiFold Box Spring provides plenty of support for your mattress, and the metal construction gives this foundation a level of durability that extends the lifespan. The fabric cover creates the look of a standard box spring, helping you give a temporary setup a more permanent feel, and the taut upholstering creates a clean, sleek look. White sides are easy to match with the rest of your bedroom's decor, or they can be concealed with an appropriately sized box spring cover. With smooth rounded corners, this Zinus Night Therapy BiFold Box Spring helps you avoid bumps and scrapes when moving or cleaning around your bed.</p> <p>You have the choice to place this portable foundation directly on the floor, eliminating the need for additional furnishings, or you can use a bed frame to add height and create under-bed storage space. The functionality combined with the mobility makes this mattress foundation ideal for staging, for frequent movers and for accommodating guests.</p> <h3>Roomy and Portable</h3> <p>With this Zinus Night Therapy BiFold portable box spring, you don't have to downsize your bed for the sake of mobility. This foundation accommodates a traditional mattress while offering the look of a standard box spring. You can get set up without tools, and when you're finished, simply fold the foundation for easy transport and storage.</p> <h3>What are the measurements?</h3> <p><strong>This Zinus Night Therapy BiFold Box Spring foundation measures the assembled size when fully expanded.</strong></p>

Bed Size

Brand

Model

<ul>  <li>Available in Twin, Twin XL, Full, Split Queen, Split King and Split California King</li>  <li>Innovative folding mattress foundation designed for easy mobility</li>  <li>Made from heavy gauge steel for long-lasting durability</li>  <li>No assembly required, simply open the box, slide the foundation out and unfold</li>  <li>Fabric cover</li> </ul>

Specifications

<ul>
<li>Available in Twin, Twin XL, Full, Split Queen, Split King and Split California King</li>
<li>Innovative folding mattress foundation designed for easy mobility</li>
<li>Made from heavy gauge steel for long-lasting durability</li>
<li>No assembly required, simply open the box, slide the foundation out and unfold</li>
<li>Fabric cover</li>
</ul>

Size

Twin

Twin-XL

Full

Split King

Split Queen

We couldn't get a traditional box springs up the stairs, it got stuck.  This box springs is not only a split queen, but each piece also folds in half!  How do they do it?  I have no idea!  Genius!  It came in a small-ish box, so I was worried that they had only sent one box springs....I was wrong!  They were both folded up nice and neat inside the box!  My husband and I had to drag them upstairs together, because they were kind of heavy and it took both of us to get them out of the box, but then we very easily assembled them.  You just open them up, and pull on the frame and Voila!  The box springs spring into life!  All we had to do then was run the zipper around the fabric and they were finished.  Probably only took 15 minutes to set up.  And now we have a proper support for our mattress--sleeping on two mattresses was like sleeping on quicksand, everything sank towards the middle!  Would definitely recommend this!

Folding Split Queen Box Springs

Fantastic!! Bought the King Size. So incredibly easy to open, unhold and zip up!! Sturdy!! Better than a wood frame box spring. Height is 9". Was delivered right into my living room. Great product from a great company! Very glad I bought it. Thank you!!

Zinus King Size Foldable Box Sring Mattress 2 pcs

Easy to assemble but not needed for the mattress purchased although Sam's suggested it. It makes my bed sit super high; so much so that I need a step stool to get on the bed.

You May Not Need It

I purchased the queen  size.  I was able to carry half 2 sets of long  narrow stairs. Easily undold them . Impossible to do it if  the box spring was not divided and folded.

Excellent  to carry and set up  for a petite woman

5 stars! Love the Zinus Night Therapy BiFold Box Spring! I previously purchased a King size for myself, and liked it so much that I bought another, a Queen size for my daughter's bed....she loved it as well. This box spring is so convenient! All you have to do is just unfold it, and it's good to go. The only minor thing I wish was different, is that it would come in one solid piece instead of two separate pieces. It's kind of like having two twin box springs instead of one box spring. Other than that....great!

Buy the Zinus Box Spring!

Good quality steel frame with heavy cloth encasement, easy set up, not too heavy to manage with one person.

Good quality steel frame.

Shipping box wasn't too big to handle and the bifold design is great for getting down hallways or any tighter space. The inner construction is solid, the cover is nice, and set up is easy. Nice product.

Worth the Money

This two piece box spring is convenient. I was able to open the box and carry it into the house myself. It will make moving a little easier too. Great price for what seems to be a pretty well made product.

Works well

I bought two queen folding box springs twice before and I liked him very much. This time I received two smaller box springs that equal the size of a queen and I do  not like them. It was not mentioned that they were going to be two separate box springs that you put together underneath a queen mattress. It causes things to shift around and I don't like this at all!

Not the same as before.

Problem with decompression, it's been more than two weeks since I opened never fluffed up properly.The sides all are floppy and the middle is puffy.

Not as good as the first time I bought

Zinus Night Therapy Preassembled Box Spring Foundation, Various Sizes

Shipping

Highlights

ZINUS Night Therapy SmartBase Tool-Free Assembly Mattress Foundation