Search  for anything...
Zinus

Sleep Master 9 inch High Profile Bifold Box Spring, Split King

  • Based on 3,692 reviews
Condition: New
Checking for the best price...
$276.69 Why this price?
New Year Deal · 37% off was $439.00

Buy Now, Pay Later

As low as $46.12 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 90-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Feb 8
Order within 1 hour and 27 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: King


Features

  • Sturdy Steel Frame With Poly Jacquard Cover
  • Folding mattress foundation compresses for easy mobility and storage
  • Designed to have the look of a traditional box spring
  • No assembly required, simply open the box, slide the foundation out and unfold, it will immediately open to the shape of a box spring
  • Steel frame with fabric cover

Description

Believe it or not, we’ve made the box spring more functional, more durable, and dare we even say, fun! Our No Assembly Box Spring is not your average foundation. Its folding design not only makes set-up insanely easy, but it also comes in handy on moving day, maneuvering easily in and around tight hallways and corners. What’s more, it features a structure made of thick and durable steel, meaning that frames and mattresses may come and go, but this box spring will be with you for the long haul. Once unboxed, this brilliant foundation practically assembles itself by taking shape once unfolded. Essentially, deciding where to place the bed will take longer than setting up this box spring. Backed by both our 5-year worry free warranty and hundreds of positive customer reviews, this box spring is about as easy as decisions get.

Brand: Zinus


Size: King


Item Firmness Description: Medium Firm


Cover Material: Poly Jacquard


Number of Layers: 1


Fill Material: Steel


Weight Limit: 700 Pounds


Special Feature: Durable


Color: White


Model Name: 9 Inch No Assembly Metal Box Spring


Product Dimensions: 79 x 75.5 x 9 inches


Item Weight: 35.9 pounds


Manufacturer: Sleep Revolution


Item model number: SM-SC-BIFD-9SK


Is Discontinued By Manufacturer: No


Fabric Type: Sturdy Steel Frame With Poly Jacquard Cover


Refill: Steel


Maximum recommended load: 350 Pounds


Finish types: Painted


Care instructions: Spot Clean Only


Assembly required: Yes


Warranty Description: 5-year warranty.


Batteries required: No


Included Components: Box Spring, Bed Frame, Instruction Manual


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 8

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Fast and easy
Size: Split Queen
Review Image by JEDI JEDI
Fast delivery, easy set up. Fit great. Looks good. Seems sturdy.
Reviewed in the United States on January 11, 2026 by JEDI JEDI
    • Perfect Mattress Foundations!!
Size: Split Queen
This is the perfect mattress foundation. Easy to move into or around your house, especially for downstairs bedrooms, or upstairs for that matter ... if you need to navigate a stairway, these are the mattress foundations for you!! Come folded with the cover already installed, but unzipped. Having the cover unzipped allows you to unfold the metal frame without having to remove the covers. Simply carry over to the bed frame, unfold, zip the cover and put into place ... BOOOM! your ready for the mattress!! Could absolutely not be more convenient and easy to assemble and use. Lastly, provides firm support for your mattress and provides that extra hight to the mattress that makes it more comfortable to sit on the bedside, giving you a better hight for making the bed, etc. I use them in two bedrooms and love them. Very highly recommended. ... show more
Reviewed in the United States on February 24, 2024 by Ed B.
    • Love it!
Size: Split Queen
Very good quality and easy set up! We love the fact it folded so it was a breeze to get upstairs ! I would definitely buy this product again!
Reviewed in the United States on August 4, 2025 by Harllee
    • One year owner
Size: Split Queen
Had an issue getting a full size box spring through our house; these solved the problem! They are super lightweight and easy to move, easy to setup and come super compact. No issues after one year of use; recently moved our bed and they still looked brand new!
Reviewed in the United States on August 14, 2025 by Daniel G
    • Easy peasy box springs
Size: Split Queen
Wow. This box springs was so easy! We have a small town house. We had difficulty moving a regular box springs we had from one city to our current house so I saw this on Amazon. It looked way too easy to be true. But it totally was unbelievably easy to get in the front door and up the staircase. No problem maneuvering around the landing and into the bedroom. 5 minutes to unbox and 5 minutes to assemble. It fit the frame perfectly. I’m 68 and could have easily done it myself after watching the 1 min video. It’s even labeled, “top” and “bottom”. Waiting on the new mattress to test it out. ... show more
Reviewed in the United States on April 23, 2025 by dmw
    • Very Satisfied
Size: Split Queen
There was a little delay with delivery and that’s why my overall rating was a 4. The box springs are wonderful. They have made a big difference in comfort and sturdiness of my bed. I highly recommend this product. The delay in delivery was handled in a timely manner. Amazon customer service representatives were very helpful. I’m so glad I made this purchase. ... show more
Reviewed in the United States on March 28, 2023 by alice d davis
    • Perfect box spring
Size: Split Queen
Not sure why all box springs arent built like this. Easy to put together and perfect box spring
Reviewed in the United States on November 15, 2025 by Cody
    • Just WOW. This is really well made and engineered beautiful. Worth the price
Size: Split Queen
I was skeptical about this at first since it seemed too good to be true on the setup...but, this is VERY HIGH QUALITY. The engineering of how its packaged is genius. Literally take it out of the box, open it and it locks into position and expands rock solid in 2 minutes and easy for 1 person to do. On the bed, you'd never know its in two pieces...seems like a regular, one piece, high quality bedspring. I can't say enough good things about!!! ... show more
Reviewed in the United States on January 8, 2026 by Rooser

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...