One solution that will allow you to still individually move your sides would be to use a flex top or solid Sleep Number sheet set. It will keep you from falling in the gap, but still allow movement. I have some customers who also use a flextop or solid topper or mattress, pad and sheet, however the more layers on top tomorrow awkward individual movement might be. The good thing is that with these solutions, you are not forcing more into the split, and as needs change, or as you figure out how to cuddle or have activities side to side they can be removed. Answer from Deleted User on reddit.com
Wayfair
wayfair.com › keyword.php
Split King Bed Gap Filler | Wayfair
Designed from breathable fabric ... 2.1 inches for gap filler, ensuring a perfect connection between mattresses. Whether you have a split king setup or prefer dual mattresses, or to enjoy the utmost comform of an adjustable bed, or even to turn around to take care of baby on the baby bed our bed bridge connector enhances your ...
Reddit
reddit.com › r/sleepnumber › split bed gap filler?
r/sleepnumber on Reddit: Split bed gap filler?
October 14, 2023 -
So I've had a king size split bed for awhile now. I like the individual control, however, I don't like that the split in the middle really gets in the way of cuddling and activities. Was wondering if anyone has recommendations as to what they use to fill in the gap from time to time aside from just a blanket or pillow
I really wish sleepnumber had a perfect formed foam cutout I guess
Top answer 1 of 6
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One solution that will allow you to still individually move your sides would be to use a flex top or solid Sleep Number sheet set. It will keep you from falling in the gap, but still allow movement. I have some customers who also use a flextop or solid topper or mattress, pad and sheet, however the more layers on top tomorrow awkward individual movement might be. The good thing is that with these solutions, you are not forcing more into the split, and as needs change, or as you figure out how to cuddle or have activities side to side they can be removed.
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Go on Amazon and look up something called a bed bridge. This has helped a ton of my customers and may be a good fit got you.
Videos
01:57
🛏️ Say Goodbye to Sliding Mattresses & Gaps! Introducing the ...
01:38
How To Keep XL Twin Mattresses From Separating (Split King Adjustable ...
01:07
Watch If you have a split king, this bed bridge will fill the gap ...
03:18
Split King Mattress Gap - Easy Fix - YouTube
06:38
Split King Mattress Concerns: Will I Fall In The Middle? - YouTube
Twin to King Bed Bridge,Split King Gap Filler for Adjustable ...
Can I use a split king on a regular king bed frame?
Yes, you can use a split king on a regular king bed frame as long as the frame has proper center support. The dimensions of a split king (two twin XL mattresses) match exactly with a standard king frame.
However, regular king frames may not have features designed to prevent mattress separation. For the best results, add non-slip pads between the mattresses and frame, and consider using mattress connector straps for extra stability.
amerisleep.com
amerisleep.com › blog › mattress guides › how to keep a split king mattress together
How to Keep a Split King Mattress Together - Amerisleep
Can I use regular king sheets on my split king mattress?
Regular king sheets can work on a split king mattress, but they're not ideal for preventing gaps. Standard king fitted sheets may not have enough elastic tension to keep both mattresses firmly together.
Instead, look for split king sheet sets specifically designed with features like center connectors or extra-strong elastic. If you do use regular king sheets, make sure they have deep pockets and strong elastic that can grip both mattresses securely.
amerisleep.com
amerisleep.com › blog › mattress guides › how to keep a split king mattress together
How to Keep a Split King Mattress Together - Amerisleep
Will a mattress topper really help keep my split king mattresses together?
Yes, a mattress topper can significantly help keep your split king mattresses together. A single king-sized topper creates a unified surface across both mattresses and helps bridge the gap between them.
The weight of the topper adds stability that prevents the mattresses from shifting apart during the night. For best results, choose a topper that's at least 2 inches thick and made of memory foam or latex that holds its shape well.
amerisleep.com
amerisleep.com › blog › mattress guides › how to keep a split king mattress together
How to Keep a Split King Mattress Together - Amerisleep
Walmart
walmart.com › home
Split King Gap Filler Adjustable Bed
$3699current price $36.99Jakoola Foam Bed Bridge Twin To King Converter, Bed Gap Filler for Small Gap, Mattress Gap Connector, White ... Split King Gap Filler for Adjustable Bed,Twin to King Bed Converter Kit,Bed Bridge Twin to King,Mattress ...
Amerisleep
amerisleep.com › blog › mattress guides › how to keep a split king mattress together
How to Keep a Split King Mattress Together - Amerisleep
November 13, 2025 - Use Physical Connectors and Non-slip Solutions: The most effective methods for preventing mattress gaps include using non-slip pads between the mattresses and foundation, mattress connector straps that physically join the mattresses together, and bed bridges or gap fillers that create a smooth transition between surfaces. Strengthen Your Bed Foundation: Regularly check and tighten all bed frame components, consider adding a sturdy headboard connected directly to the frame, and choose a foundation specifically designed for split king setups with connector hardware or locking mechanisms.
Lowest Cost Mattress
lowestcostmattress.com › collections › adjustable beds & accessories › [bed bridge twin to king] split king gap filler for adjustable bed - mattress connector replaces a mattress gap filler and better bedder band. twin to king bed converter kit to join two twin beds
[Bed Bridge Twin to King] Split King Gap Filler for Adjustable Bed - Mattress Connector Replaces a Mattress Gap Filler and Better Bedder Band. Twin to King Bed Converter Kit to Join Two Twin Beds
[Bed Bridge Twin to King] Split King Gap Filler for Adjustable Bed - Mattress Connector Replaces a Mattress Gap Filler and Better Bedder Band. Twin to King Bed Converter Kit to Join Two Twin Beds
Brand: Bedbinder DeluxeColor: WhiteFeatures:
♥💓 Looking For A Bed Bridge That Prevent You From The Gap In The Middle Of Your Twin Bed, Right? 💓♥ This Bed Bridge of Bedbinder DeLuxe is all you need when you want to get rid of the your Bed Gap or Sliding Mattresses. This Twin Bed Connector does not only replace the Bed Gap Filler or Twin Gap Filler, but this Mattress Connector also works as a Bed Space Filler and can be used with or without a Better Bedder or a Topper
👑🛌 Over 75.000 Happy Customers In The USA 🛌👑 Having these Bed Straps for Mattress of Bedbinders, you don't need your Gap Filler
Price US$67.00
GhostBed®
ghostbed.com › pages › problems-with-split-king-adjustable-beds
4 Problems with Split Kings (& How to Solve Them) | GhostBed®
Furniture coasters will create friction and keep your bases from migrating apart as you get in and out of bed. You can also pick up a “bed wedge” or “gap filler.” This accessory is usually made from memory foam.
Reddit
reddit.com › r/mattress › having trouble eliminating a split king gap
r/Mattress on Reddit: Having trouble eliminating a split king gap
October 16, 2017 -
I've been renting a room for a year now and the bed is really killing me. It's two smaller mattresses in a split king frame. Unfortunately I could only sleep on one side of the bed otherwise I start going into the gap and it's really uncomfortable.
I bought this gap filler thing that helps slightly, but every once in a while I have to move it around because it goes out of place.
On top of that I also built a quilted mattress topper which helps much more, but I can still really only sleep on one side comfortably because I can still feel a gap or a bump in the middle of the bed.
So I was thinking maybe I should also get a 2inch memory foam topper to put underneath the quilted one? Does anyone think that'll help or have any other suggestions? I can't buy a new bed or frame sadly
Edit: solution was to move out of that flat. My back is so much happier for it.
Top answer 1 of 2
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I am in the process of making the jump to a split king myself, so this is untested by me, but have you tried a gap filler (bed bridge) with straps that go around both of the mattresses?
https://www.amazon.co.uk/Bed-Bridge-Twin-King-Converter/dp/B082LYR9VF/ref=pd_sbs_196_5/258-4862451-2607866?_encoding=UTF8&pd_rd_i=B082LYR9VF&pd_rd_r=35db9956-a0aa-4e3c-8ec1-0cf7865b5203&pd_rd_w=AzGHj&pd_rd_wg=m2yKs&pf_rd_p=2773aa8e-42c5-4dbe-bda8-5cdf226aa078&pf_rd_r=YDSM7002WJ3FS1ZS8RCF&psc=1&refRID=YDSM7002WJ3FS1ZS8RCF
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I am having the same problem. There are 2 solutions I am considering.
https://www.amazon.com/dp/B00LAJF2G2/ref=cm_sw_em_r_mt_dp_U_3xD9Eb656CJTX
and
https://youtu.be/yeuXBK9TlP0
Maybe both?
Amazon
amazon.com › split-king-gap-filler-adjustable-bed › s
Amazon.com: Split King Gap Filler For Adjustable Bed
Amazon.com: split king gap filler for adjustable bed
Lowes
lowes.com › pd › VEVOR-Bed-Bridge-King-Bed-Converter-Kit-Split-King-Gap-Filler-for-Adjustable-Bed-Mattress-Connector-Mattress-Gap-Filler-with-Heavy-Duty-Metal-Buckle-Strap-25D-Memory-Foam-100in-L-x-24in-W › 7486516
VEVOR Bed Bridge King Bed Converter Kit Split King Gap ...
Shop tools, appliances, building supplies, carpet, bathroom, lighting and more. Pros can take advantage of Pro offers, credit and business resources.
Amazon
amazon.ca › Bed-Bridge-Twin-King-Converter-Twin › dp › B0CF58NDYX
Bed Bridge-Twin to King Converter kit,Adjustable Mattress Bed Connector,Split King Gap Filler Twin Bed Connector to King Making,for Stayover,Family Room and Vacation Rentals : Amazon.ca: Home
Bed Gap Filler ** Exclusive | Bed Bridge and Mattress Gap Filler – Twin to King Converter kit – Mattress Wedge to Create a King-Size Bed – Twin Bed Connector ... EPHEDORA 12" Extra Wide Bed Bridge Twin to King Converter Kit - Split King Gap Filler for Adjustable Bed - Mattress Connector & Gap Filler for Bed - 25D Memory Foam - Patent Pending Design
Amerisleep
amerisleep.com › blog › mattress guides › how to turn two twin size mattresses into a king size mattress
How to Turn Two Twin Size Mattresses Into a King Size Mattress - Amerisleep
November 13, 2025 - A mattress wedge, also known as a “pont d’amour” or love bridge in French, is the simplest and cheapest way to erase the seam between two mattresses. It is a T-shaped attachment that fills up the gap between two beds, with the wedge staying ...
The Home Depot
homedepot.com › p › SKYSHALO-Bed-Bridge-King-Bed-Converter-Kit-Split-King-Gap-Filler-with-Metal-Buckle-Strap-25D-Memory-Foam-75-in-L-x-8-in-W-CQL75W8INCHZILLDJV0-SK0506 › 336168822
SKYSHALO Bed Bridge, King Bed Converter Kit, Split King Gap Filler with Metal Buckle Strap 25D Memory Foam (75 in. L x 8 in. W) CQL75W8INCHZILLDJV0-SK0506 - The Home Depot
SKYSHALO Bed Bridge, King Bed Converter Kit, Split King Gap Filler with Metal Buckle Strap 25D Memory Foam (75 in. L x 8 in. W) CQL75W8INCHZILLDJV0-SK0506
Bed Bridge-Transform your sleep space in seconds This T-shaped bed bridge quickly connects two beds into a super-sized bed. Made with skin-friendly fabric and high-density foam, it offers comfortable and stable support. The 8 in. wide design, along with a 33 ft./10 m long bed strap, effectively prevent mattress shifting. Installation is simple-just three easy steps-making it perfect for use in homes, hotels, and various other settings.
Price US$28.99
Reddit
reddit.com › r/mattress › sleep number flex top king gap filler.
r/Mattress on Reddit: Sleep number flex top king gap filler.
August 17, 2022 -
My wife and I have a flex top sleep number king sized bed. We love the bed, but I would love to find a product that I could use to fill the gap when I want it filled. So far I've looked all over online and cannot find any products that are intended to fill it. Has anyone found anything for this?
Amazon
amazon.com › Vekkia-Bridge-Twin-King-Converter › dp › B0C819BQ9Y
Amazon.com: Vekkia Split King Gap Filler for Adjustable Bed,Twin to King Bed Converter Kit,Bed Bridge Twin to King,Mattress Connector with Washable Cover,for Guests Stayovers,Family Room(75in×10in) : Home & Kitchen
Amazon.com: Vekkia Split King Gap Filler for Adjustable Bed,Twin to King Bed Converter Kit,Bed Bridge Twin to King,Mattress Connector with Washable Cover,for Guests Stayovers,Family Room(75in×10in) : Home & Kitchen
Ortho Mattress
orthomattress.com › blogs › ortho-mattress-blog › how-does-a-split-king-mattress-work
How Does a Split King Mattress Work? Know The Functions
June 9, 2025 - You can keep split king mattresses together by using a non-slip mattress connector, split king gap filler, or a tight-fitting fitted sheet that covers both mattresses.
Juna Sleep Systems
junasleep.com › split-king-mattress-no-gap-solution
Say Goodbye to That Annoying Gap in Your Split King Mattress
September 3, 2025 - Until now, most split king mattresses were designed for adjustability first, ignoring the inevitable drift. But there’s a better way. People try all sorts of hacks to fix the gap. Here’s the cold truth: Mattress straps? They work… until you adjust the bed and they snap tight. Foam fillers?
Amazon
amazon.ca › s
Amazon.ca: Split King Gap Filler For Adjustable Bed Twin Xl
Amazon's Choicefor "split king gap filler for adjustable bed twin xl"
Sleep Advisor
sleepadvisor.org › home › mattress information
What to Know Before Purchasing a Split King Bed - Sleep Advisor
July 26, 2024 - The gap filler creates a small bridge and eliminates any dip between the bed. You can place it into the space between the mattresses either before you’ve made the bed (using King sheets) or after (using Twin XL sheets).
The Well-Trained Mind Community
forums.welltrainedmind.com › lounge › the chat board
Anyone have a split king bed? I need to fill that gap! - The Chat Board - The Well-Trained Mind Community
December 29, 2024 - We recently purchased an split adjustable base bed with 2 twin XL mattresses. I now know why they didn't have one on the floor-that gap is much bigger than they pitched it. I know there are products to bridge the gap, but Is there one you would recommend? Thanks!!
Amazon
amazon.ca › Split-King-Gap-Filler-Spring › dp › B08GQGJWZV
Split King Gap Filler for Box Spring Bed - Bed Bridge Wedge for King and Queen - Bed Straps for Mattress - Universal Twin to King Bed Converter Kit : Amazon.ca: Home
Split King Gap Filler for Box Spring Bed - Bed Bridge Wedge for King and Queen - Bed Straps for Mattress - Universal Twin to King Bed Converter Kit : Amazon.ca: Home