Mainstays 5" Twin-XL High Profile Easy Assembly Smart Metal Box Spring
Mainstays 5" Twin-XL High Profile Easy Assembly Smart Metal Box SpringMainstays 5 Twin XL High Profile Easy Assembly Smart Metal Box SpringMainstays 5 King High Profile Easy Assembly Smart Metal Box SpringMainstays 5 Twin High Profile Easy Assembly Smart Metal Box SpringMainstays 5 Queen High Profile Easy Assembly Smart Metal Box Spring
Key item features
- Easy Setup: 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 strong support for any innerspring, memory foam, or combination mattress.
- Durable Construction: Made with a powder-coated steel frame for long-lasting use.
- Weight Capacity: Twin and Twin XL support up to 600 lbs; Full, Queen, King, and California King support up to 1200 lbs.
- Size Options: Available in Twin, Twin XL, Full, Queen, King, and California King sizes.
- Polyester Cover: Features a 100% polyester jacquard cover to prevent mattress shifting.
- Dimensions: Twin XL dimensions: 79" x 38" x 5"H - 24.43 lbs; Shipping dimensions: 42.1" x 10.8" x 6.1" - 28.13 lbs.
Generated by AI
Specs
- Box spring typeMattress Foundation
- MaterialSteel, Jacquard
- Max load600 lb
- FeaturesFoldable
- Height5 in
- Assembly reqY
Reviews summary
Pros
- : Quick and straightforward process requiring no tools.
- : Made with robust materials and a solid build.
- : Offers great value at this cost.
Neutral
- : Can be snug, but also inconsistent across users.
- : Can be sturdy, but may also be prone to warping or bending.
- : Can be snug, but also prone to sizing issues.
Generated by AI
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About this item
Product details
Set yourself up for a great night's sleep with the Mainstays 5" White Jacquard Smart Box Spring. Offers the look and functionality of a traditional box spring but made from steel providing ultra-sturdy support for any innerspring, memory foam or combination mattress, features a 100% polyester jacquard covering that prevents shifting. This innovative box spring is designed to easily fold up for convenient storage and transport when not in use. The Mainstays 5" White Jacquard Smart Box Spring sets up in seconds with no tools required and is available in Twin, Twin XL, Full, Queen, King, and California King.
- Sets up easily in seconds
- An innovative design allows the box spring to easily fold up for storage and transport when not in use
- Provides ultra-sturdy support for any innerspring, memory foam, or combination mattress.
- Features a 100% polyester jacquard cover
- Constructed with a durable powder coated steel frame for a long life and reliable use
- Easy to assemble with no tools required
- Available in Twin, Twin XL, Full, Queen, King, and California King sizes
- Twin and Twin XL can support up to 600 lbs. total weight capacity
- Full, Queen, King, and California King can support up to 1200 lbs. total weight capacity
- Mattresses and bed frames sold separately
- Please see our assortment of mattresses
- Assembled Product Dimensions:
- Twin dimensions: 74" x 38" x 5"H - 23.83 lbs.
- Twin XL dimensions: 79" x 38" x 5"H - 24.43 lbs.
- Full dimensions: 74" x 53" x 5"H - 34 lbs.
- Queen dimensions: 79" x 59" x 5"H - 37.4 lbs.
- King dimensions: 79" x 75" x 5"H - 44.58 lbs.
- California King dimensions: 83" x 71" x 5"H - 43.63 lbs.
- Shipping Product Dimensions:
- Twin shipping dimensions: 41.3" x 11.2" x 6.1" - 27.64 lbs.
- Twin XL shipping dimensions: 42.1" x 10.8" x 6.1" - 28.13 lbs.
- Full shipping dimensions: 56.3" x 11.2" x 6.1" - 38.8 lbs.
- Queen shipping dimensions: 62.4" x 11.2" x 6.1" - 42.6 lbs.
- King shipping dimensions: 78.5" x 11.2" x 6.1" - 50.42 lbs.
- California King shipping dimensions: 74" x 11.2" x 6.1" - 48.6 lbs.
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Box spring type
Mattress Foundation
Material
Steel, Jacquard
Max load
600 lb
Features
Foldable
Warranty
Warranty information
Limited Five (5) Year Warranty, Warranty available to original purchaser only. Proof of purchase is required. This warranty is your sole remedy for product defects only and does not cover damage due to mishandling, misuse, or abuse. The defects include circumstances where the frame is broken under normal use and no longer performs its function. The manufacturer is not responsible for incidental or consequential damages. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Our product is designed and manufactured to meet the highest quality standards. In the event that you have assembly questions, or parts are missing or damaged, please let us know before you decide to return your product to the store. Please contact customer service directly at: Email: CustomerService@gesin-cn.com Service Hours: Central Standard Time Monday - Friday: 9:00am - 4:00pm 1-800-681-0084 Thank you for purchasing our products. Inno-Sports Co., Ltd
Customer ratings & reviews
How item rating is calculated
Reviews summary
Pros
- : Quick and straightforward process requiring no tools.
- : Made with robust materials and a solid build.
- : Offers great value at this cost.
Neutral
- : Can be snug, but also inconsistent across users.
- : Can be sturdy, but may also be prone to warping or bending.
- : Can be snug, but also prone to sizing issues.
Generated by AI
Was this summary helpful?
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Showing 1-3 of 8,112 reviews
Jul 17, 2025
Angelina
Item details
Bed size: King
5 out of 5 stars review
Verified Purchase
Highly recommend 👌
Im on day one of having this and can already feel a big difference in support for this King 100 lb mattress our frame only has wood slats and wasnt enough plus this gave us the perfect height we wanted for our bed. The assembly was RIDICULOUSLY easy, no screws, no tools needed GREAT, took me literally 10/15 mins to put together. Was going to spend $150 for a 4 inch one on Amazon but happy i took this chance on Mainstay brand. Metal feels sturdy, the cover was easy to slip on.
Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776824645012
Jan 29, 2026
Rob
Item details
Bed size: King
5 out of 5 stars review
Verified Purchase
Sturdy and Easy to Assemble
The box spring was surprisingly easy to assemble by one person. Most of the interior structure is preassembled and merely needs to be unfolded. The cover was very easy to zip up over the assembled frame. Once assembled, the item is very sturdy. It fit into our antique bed frame perfectly, without the need for any bed slats.
Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776824645012
Feb 15, 2026
Niki
Item details
Bed size: Queen
5 out of 5 stars review
Verified Purchase
Easy!
This was so easy to assemble. It looks intimidating when you first unbox it but it's nothing more than just snapping parts together. No tools needed! I ordered a king size and assembled this in less than 10 mins. The cover is easy just unzip all the way and tuck in box spring then re-zip. It's very sturdy not squeaking or noises and is supporting my hybrid mattress nicely
Helpful?78f4cf10-4508-11f0-b3a2-1fa7e18da776824645012
