I have a few notes for you. We were in the same situation recently and had a similar solution. We got two cheap adjustable frames from Amazon and two Sleepnumber C2 mattresses. (everything Twin XL). We put those together inside the footprint of our existing bed. Like the other poster said, this leaves a gap between the mattresses that is kind of strange. The sleepnumber mattresses specifically are very lightweight, so they move more than a standard mattress probably would. I'm currently returning the sleepnumber, and opted for a heavier duty innerspring mattress. i found that I just like the feel of innersprings more than a Sleepnumber at 90-100 percent. If you decide you want Sleepnumber, I would strongly recommend going for the flextop model, and find two twin XL bases someplace else. This would let you adjust the head of your bed independent of your husband's side, but it's still a single mattress, so you won't have a big gap to worry about. Answer from Square-Wild on reddit.com
Good Housekeeping
goodhousekeeping.com › home & outdoor products › mattress reviews › 5 best split king adjustable beds for back pain, snoring, and better sleep
5 Best Split King Adjustable Beds for Back Pain, Snoring, and Better Sleep
November 21, 2025 - If your sheets don't come in a ... offers Twin XL sheets, which can work in a pinch, or look for a brand that offers the ability to build your own set by purchasing each component separately. Additionally, if you find that your sheets are often slipping off when using an adjustable bed base, consider opting for a set with wide elastic straps around the corners for extra stability, like those offered by Sleep Number...
Reddit
reddit.com › r/mattress › adjustable + standard twin xls = king?
r/Mattress on Reddit: Adjustable + standard twin xls = king?
April 24, 2023 -
My husband (50m) and I (42f) have been married for almost 15 years and for the past 2 years I have been sleeping almost exclusively in our “spare” room because the bed is more comfortable and there’s more space that way so we BOTH sleep better. My husband admits that we sleep better now but is still not happy about the situation and he is finally willing to look into upgrading to a sleep number type split king (currently have Queen) My husband likes a much firmer mattress than me and has NO interest in using an adjustable frame so he has suggested getting a twin xl adjustable for me and just a standard flat bed from ikea or something for him in order to save money. Is this a thing that would work at all?? Would it even save money?? I have found ZERO information on the internet about it and am frankly getting pretty frustrated.
Top answer 1 of 2
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I have a few notes for you. We were in the same situation recently and had a similar solution. We got two cheap adjustable frames from Amazon and two Sleepnumber C2 mattresses. (everything Twin XL). We put those together inside the footprint of our existing bed. Like the other poster said, this leaves a gap between the mattresses that is kind of strange. The sleepnumber mattresses specifically are very lightweight, so they move more than a standard mattress probably would. I'm currently returning the sleepnumber, and opted for a heavier duty innerspring mattress. i found that I just like the feel of innersprings more than a Sleepnumber at 90-100 percent. If you decide you want Sleepnumber, I would strongly recommend going for the flextop model, and find two twin XL bases someplace else. This would let you adjust the head of your bed independent of your husband's side, but it's still a single mattress, so you won't have a big gap to worry about.
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Have you slept on a split king bed before? It’s exactly like sleeping on twin size mattress. So going from a queen to a twin might be a struggle for both of you, since you’re used to sleeping on separate queen mattresses. A one piece king has a lot of room, but split king is a whole different story with the crack that runs down the middle. I was told this several times by people and didn’t understand, but now I do. I just recently went from a king to split king with adjustable bases and wish I wouldn’t have done that. Because it’s like me and my wife are sleeping on different beds, and much smaller beds than we were when it was a one piece king. My mattress is DIY so it’s easy for me to get a king encasement and switch back to a one piece king, which I will eventually do after my wife has our baby (She likes the adjustable base while pregnant). And if she’s pregnant again later I can always switch it back to a split king. If the adjustable base isn’t that important to you, you can try a one piece king mattress that has different firmness levels on each side like the sleeponlatex, sleep number or something similar. If the adjustable base is important and you get the twin xl’s (split king) you can always just get one twinxl adjustable base and a regular base and put them side by side. Just make sure the heights will be the same. There’s no issues in doing something like that. Also look at the Malouf adjustable bases, very nice, with a lot of features and is way cheaper than others I’ve found. I have the S755 in 2 twinxl’s and it was $2,300 delivered from Rest Right Mattress. You have to contact them to get the best price, as their listed prices are higher. Good Luck!
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Sleep Number
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Adjustable Bed Frames & Bases | Sleep Number | Sleep Number
Enhance your sleep experience with adjustable beds and bases from Sleep Number, offering customizable options for personalized sleep comfort and support.
Sleep Number
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c1 Smart Bed | Affordable Adjustable Mattress | Sleep Number
Flexfit® 1 Smart Base · Head Adjustability · Includes Partner Snore, Under-bed lighting and Smart device control. $1,299 · Flexfit® 2 Smart Base · Head & Foot Adjustability · Includes Partner Snore, Under-bed lighting, Smart device control ...
Sleep Number
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Shop Twin XL Mattresses | Sleep Number
Explore our adjustable Twin XL mattresses, a great choice for couples.
Sleep Number
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FlexFit™ 2 Smart Adjustable Bed Base | Sleep Number
December 11, 2025 - Twin XL: 79.5" L x 37" W x 8" H · Full/Double: 73.5" L x 53.5" W x 8" H · Queen: 579.5" L x 59.5" W x 8" H · King: (Include Split & FlexTop King): 79.5" L x 75.5" W x 8" H · Cal King: (Include Split & FlexTop Cal King): 83.5" L x 71.5" W ...
Sleep Number
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Mattresses, Bedding, Pillows | Sleep Number
Discover personalized comfort with Sleep Number's innovative mattresses, pillows, and smart beds. Achieve your best sleep for a healthier, happier you.
Airpedic
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Sleep Number Alternative | Airpedic vs. Sleep Number
February 22, 2024 - Yes, all Airpedic® mattresses are compatible with adjustable beds. They’re designed with a unique notched railing system to flex and contour perfectly to adjustable bed frames, enhancing your sleep experience with versatile positioning.
Quora
quora.com › Can-any-adjustable-base-work-with-a-sleep-number-bed
Can any adjustable base work with a sleep number bed? - Quora
Answer (1 of 2): It depends. The new 360 Smart Beds must use the Sleep Number 360 adjustable base. They were designed by Sleep Number to work together and stay together using magnets instead of being bolted together.
eBay
ebay.com › home & garden › furniture › beds & headboards › beds & bed frames
Sleep Number Flexfit 2 Smart Base Twin XL new Plus Smart Number Smart Remote | eBay
Sleep Number Flexfit 2 Smart Base Twin XL new Plus Smart Number Smart Remote
Twin XL: 79.5" L x 37" W x 8" H. 360 Standard Adjustable Legs included with bed. There are 7 settings on the legs that range from 13.75" to 18.25". Endless positions and favorites like the feeling of zero gravity.
Price $800.00
Sleep Number
sleepnumber.com › products › ib-1080
Integrated Base | Shop Smart Bed Bases | Sleep Number
Stylish upholstered base designed to provide a firm level surface for your Sleep Number® smart bed. Designed specifically for the Sleep Number® smart bed, it coordinates with the mattress.
Facebook
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Amazon
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Amazon.com: Sleep Number Twin Bed With Base
Twin XL · Full · Full XL · Queen · King · California King · Specialty Sizes · Sustainability Features · Any Feature · Forestry Practices · Included Components · Installation Manual · Slat · Headboard · Drawer · Storage Box · Guardrails · Slide · Frame Type · Adjustable ·
Wayfair
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Sleep Number Adjustable Beds | Wayfair
Adjust the head and foot sections independently or together to find your perfect position anytime. Built with a durable integrated metal frame that supports up to 1,000 lbs, this bed is designed for lasting comfort. It’s compatible with most mattresses, and the padded frame helps protect your mattress while adding an extra layer of softness. 🌟Two Sizes: Twin XL & Split King (= 2 Twin XLs) – perfect for couples with different sleep preferences or anyone who wants total flexibility.
Yawnder
yawnder.com › adjustable bases › sleep number adjustable bases compared: top 4 must-see
Sleep Number Adjustable Bases Compared: Top 4 Must-See
August 20, 2024 - The FlexFit 1 sets the stage for entry-level adjustable bases. Featuring a head lift, it’s ideal for those who enjoy reading or watching television in bed. With prices ranging from $999.99 for a Twin XL to $2,099.99 for a King, it’s a ...
Shop My Exchange
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Sleep Number
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Sleep Number
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FlexFit™ 1 Smart Base | Sleep Number
Twin XL · Current price: $1,099 ... qualified customers Learn how · The FlexFit™ 1 smart adjustable base allows you to elevate your head and is controllable from you smart phone device....
Sleep Number
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Shop the Climate360® Mattress | Sleep Number
Includes Smart Adjustable Base · 100-night trial · 15-year limited warranty · Size guide · Size:Queen60" x 80" $9,999Add to cart · View more ways to pay · $201/mo with 60 mo financing* Learn how · HSA/FSA eligible with for qualified customers Learn how · Active cooling & warming · Play Video · Sleep up to ·
isense
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Sleep Number vs iSense Mattress - Number Bed Alternative Sleep Comfort
No matter the name on the page, adjustable bases are here to stay and make the perfect complement to your number bed purchase. What Sleep Number mattresses does the iSense Hybrid Premier compare to?
Personal Comfort
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Power-Flex™ Adjustable Power Bases | Personal Comfort
Power-Flex Adjustable beds come with Free Shipping! Zero-Gravity, Anti-Snore, Massage, Lighting & many more features.