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Mainstays

Mainstays 9" Full High Profile Easy Assembly Smart Metal Box Spring

Mainstays 9" Full High Profile Easy Assembly Smart Metal Box SpringMainstays 9 Full High Profile Easy Assembly Smart Metal Box SpringMainstays 9 Twin High Profile Easy Assembly Smart Metal Box SpringMainstays 9 Queen High Profile Easy Assembly Smart Metal Box SpringMainstays 9 Twin XL High Profile Easy Assembly Smart Metal Box SpringMainstays 9 King High Profile Easy Assembly Smart Metal Box Spring
Bed SizeFull-Out of stock
Pack SizeSingle-Out of stock

Key item features

  • Easy Assembly: Sets up easily in seconds with no tools required.
  • Innovative Design: Folds up for convenient storage and transport when not in use.
  • Ultra-Sturdy Support: Provides reliable support for any innerspring, memory foam, or combination mattress.
  • Durable Construction: Made with a powder-coated steel frame and 100% polyester jacquard cover.
  • Size Options: Available in Twin, Twin XL, Full, Queen, King, and California King sizes.
  • Weight Capacity: Supports up to 600 lbs. for Twin and Twin XL, and up to 1200 lbs. for Full, Queen, King, and California King.
  • Dimensions: Full dimensions are 74" x 53" x 9"H and weighs 36.9 lbs.
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Current price is $109.00
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Customer ratings & reviews

4.5 out of 5 stars
stars
11.2K ratings4,835 reviews
How item rating is calculated
  1. 5 stars78% (8,765)
  2. 4 stars9% (967)
  3. 3 stars3% (360)
  4. 2 stars2% (244)
  5. 1 star8% (870)

Reviews summary

Pros

  • : Setup requires minimal effort and no tools.
  • : Made with a robust build that can withstand use.
  • : Offers decent to excellent quality at a reasonable cost.
  • : Fits bed frames of various sizes.

Neutral

  • : Can be perfect for some, but may not fit others due to size variations.
  • : Can be snug, but may require effort to fit or be too small.
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Showing 1-3 of 4,835 reviews

Jul 9, 2025
WalmartCustomer
Item details
Bed size: Full
5 out of 5 stars review

Verified Purchase

We was in need of a Bed Box Spring. So, I browsed Walmart Website. And we found exactly what we needed. But, we never purchased a Box Spring that you had to assemble. But the assembling was easy. Thank Walmart, again for coming through in our time of need.

Incentivized Review
Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776143875795
Sep 24, 2025
ZoeB
Item details
Bed size: Twin
5 out of 5 stars review

Verified Purchase

This "box spring" has no springs, but it looks identical to a box spring. But the huge bonus is that due to it being in a smallish box, it will fit through virtually any doorway or up/down any set of stairs. For that reason, it is a terrific bargain. It is also extremely easy to put together and very sturdy. Don't hesitate to buy this if you have a tight space to maneuver or even if you don't!

Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776143875795
Jan 12, 2026
Kimberly
Item details
Bed size: Full
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Easy Assembly Box Spring

Whoever came up with this idea for the easy assembly boxspring is a genius. Box springs are one of the hardest things to move since they do not bend in are difficult to get up a stairwell. And this being made of metal is more sturdy than a wooden framed one this will be very easy to disassemble and fold up when I move and transport to the next home. I wish I thought of this myself. Pure genius!

Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776143875795