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
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Amazon
amazon.com › Eliminator-Closes-Mattress-Gaps-Permanetly › dp › B07LDT6B7Y
Amazon.com: Bed Gap Eliminator | Closes Mattress Gaps Permanetly - For all Mattress Types & Sizes - Easy & Without Bumpy Filler | Populair for Adjustable, Split King, Queen & Twin XL to - Best Choice for Couples : Home & Kitchen
Buy Bed Gap Eliminator | Closes Mattress Gaps Permanetly - For all Mattress Types & Sizes - Easy & Without Bumpy Filler | Populair for Adjustable, Split King, Queen & Twin XL to - Best Choice for Couples: Mattress Pads - Amazon.com ✓ FREE ...
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Quora
quora.com › How-can-I-keep-a-split-king-bed-together
How to keep a split king bed together - Quora
Answer (1 of 3): Put it in a King Bed Frame. A typical King bed mattress uses 2 Twin size box springs. These need to be kept together. The best way is with a King bed frame made from either wood or metal. Another form of King bed uses both two twin box springs and two twin size mattresses. This ...
Discussions

Twin XL "SPLIT KING" Gap issue. How to solve? - General Mattresses Questions - Mattress Underground
Any recommendations on how to solve this center gap issue? We haven’t decided on a bed frame yet, so perhaps that’s a part of the issue. But we are using 2 raze adjustable beds with the wheels locked. But still the beds part in the middle after our 60 pound boxer lays in the “void” ... More on forum.mattressunderground.com
🌐 forum.mattressunderground.com
0
May 22, 2013
Split bed gap filler?
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. More on reddit.com
🌐 r/sleepnumber
20
18
October 14, 2023
Anyone have a split king bed? I need to fill that gap! - The Chat Board - The Well-Trained Mind Community
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!! More on forums.welltrainedmind.com
🌐 forums.welltrainedmind.com
December 29, 2024
Gap Filler Needed for Split King (non-adjustable)?

Hello! I work for GoodMorning.com and just wanted to chime in.

One thing to be aware of is to ensure the mattresses don't move around so when you do place them together, there's less chance of space between them. Do get in touch with the customer care team of the mattresses you're purchasing, but you might consider placing untreated plywood under the mattresses to keep them from sliding around.

We hope this was helpful!

More on reddit.com
🌐 r/Mattress
5
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September 5, 2018
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Mattress Underground
forum.mattressunderground.com › mattress talk › general mattresses questions
Twin XL "SPLIT KING" Gap issue. How to solve? - General Mattresses Questions - Mattress Underground
May 22, 2013 - Any recommendations on how to solve this center gap issue? We haven’t decided on a bed frame yet, so perhaps that’s a part of the issue. But we are using 2 raze adjustable beds with the wheels locked. But still the beds part in the middle after our 60 pound boxer lays in the “void” i have read on amazon about the “create a king” but it doesn’t have great reviews and seems cheap.
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Walmart
walmart.com › home
Split King Gap Filler Adjustable Bed
$7999current price $79.992 in 1 Fitted Sheet Bed Bridge Twin to King, Split King Gap Filler for Adjustable, Bed Converter with Fixing Straps and Metal Buckle for Couples & Families
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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   $67.00
Find elsewhere
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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.
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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
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Tempur-Pedic
tempurpedic.com › split-king
Why Switch to a Split King | Tempur-Pedic
If the mattresses you choose for your custom Split King/CA King are of different heights, our Sleep Experts can help you understand how our adjustable bases may be able to help offset differences in mattress height.
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Tom's Guide
tomsguide.com › mattresses › mattress care
How to keep a split king mattress together — pro tips and products | Tom's Guide
July 30, 2024 - Simply tie up where the two bed bases meet. ... This one can also help if you feel or notice the gap when sleeping. Use a bed bridge (also known as a gap filler or converter kit) to fill the gap between the two beds.
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vekkia
vekkia.com › home › 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
Untitled
Detachable Bed Gap Filler - The cushion cover is removable with zipper design and non-pilling, as well as hand or machine washable, easy to put on and take off for change & wash. Portable, Easy Storage - Perfect for guest rooms, B&Bs, guesthouses and vacation rentals.
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Wayfair
wayfair.com › keyword.php
Split King Bed Gap Filler | Wayfair
Designed from breathable fabric and high-density foam, this Mattress pad to bridge gap spans 75 inches in length and 8 inches in width,with 2.1 inches for gap filler, ensuring a perfect connection between mattresses.
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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   $28.99
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Casper Sleep
casper.com › home › dreamer's digest › dreamer's digest
How to Keep Split King Mattresses Together: 7 Tips | Casper Blog
August 28, 2024 - If your split king bed has been causing “princess and the pea syndrome” (i.e., you can feel the split beneath you, and it messes with your sleep), consider getting a bed bridge.
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Ergomotion
shop.ergomotion.com › home › blog › 5 problems with split king adjustable beds [& how to fix them]
5 Problems with Split King Adjustable Beds [& How to Fix Them] - Ergomotion
April 12, 2023 - The ErgoMattress has a non-slip silicone bottom that was specifically designed for adjustable beds and helps resolve this problem. One of the most common concerns before purchasing a split king bed is dealing with the fact that each mattress has its own fitted sheet set.
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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!!
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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 - Some split king foundations include a thin strip of material in the center that fills the gap between the two bases. Platform beds with solid surfaces provide more stability than traditional box springs, which can allow more movement. Adjustable bed frames work well with split king mattresses if they include syncing features that keep both sides moving together.
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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 - Tired of the gap in your split king mattress? Discover expert solutions like the Juna H-Bed for a no-gap, adjustable comfort experience. Say goodbye to sleep disruptions!