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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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.
Discussions

Problem with pillows on adjustable bed - DoItYourself.com Community Forums
Furniture and Furnishings - Problem with pillows on adjustable bed - We have a new bed frame and adjustable Twin XL mattresses. The adjustable bases are good, but we have an issue. If we keep the bed bases pushed too far back towards the headboard, the base catches on the headboard when you ... More on doityourself.com
🌐 doityourself.com
June 28, 2020
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
How to cover the gap between the bed and headboard? It is driving me crazy!!
Push the mattress back ti fill in the gap More on reddit.com
🌐 r/HomeDecorating
37
81
November 17, 2021
Sleep number flex top king gap filler.
That works for the mattresses that are two twins pushed together but I have the one that is only split at the top. I can't find anything that is for that type of mattress. More on reddit.com
🌐 r/Mattress
25
17
August 17, 2022
People also ask

Can the Bedbinder handle different mattress heights?

Yes, it’s very adaptable! The Bedbinder can comfortably bridge mattresses even if they differ in height, keeping them snugly together.

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bedbinders.com
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Will it fit my bed?

Absolutely! Our Bedbinder is tailored to fit any bed from 1.40m to 2.20m wide, ensuring a perfect fit every time.

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bedbinders.com
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Home - Bedbinders
What if my mattress is too small for my bed?
For mattresses too small for their frames: Measure the gap size to determine the best approach. For gaps under 2 inches: Use foam gap fillers (temporary solution). For larger gaps: Install frame reducers or wooden inserts to decrease the interior dimensions. For severe mismatch: Replace either the mattress or frame for proper sizing. For two undersized mattresses: A Bedbinders connector helps maintain position even with smaller dimensions.
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bedbinders.com
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Home - Bedbinders
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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
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DoItYourself.com
doityourself.com › doityourself.com community forums › interior decorating, design, painting, upholstery and fabrics center › furniture and furnishings › problem with pillows on adjustable bed
Problem with pillows on adjustable bed - DoItYourself.com Community Forums
June 28, 2020 - I thought I would bounce the idea around here and see if others have any ideas. Thanks! ... Maybe get some big pieces of foam upholstery batting and bend it in the shape of a U to fit in the gap.
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Bedbinders
bedbinders.com › home
Home - Bedbinders
May 2, 2024 - Follow these simple steps to set up your BedBinder and enjoy a smooth, gap-free sleep surface in minutes. Place the BedBinder horizontally across the mattresses where they meet. Ensure it’s centered and aligned for maximum effectiveness. Pull the straps underneath each mattress, then tighten them using the adjustable buckles.
Find elsewhere
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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
Bigger Bed In An Instant - Simply use this twin bed connector to make a king by pushing the two mattresses together and placing the bed bridge on top between them. You'd better cover it with a mattress pad or fitted sheet for extra stability. Proprietary Gap Filling System-The piece of foam attached special material to the twin bed connector is very sturdy with inherent structural integrity.
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Puffy
puffy.com › blog › lux comfort › diy mattress gap filler
🛠️ DIY Mattress Gap Filler: Official Guide to Easy Fixes
November 21, 2023 - Can I use a mattress gap filler with adjustable beds?: Yes, but ensure the filler is flexible enough to move with the bed.
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GhostBed®
ghostbed.com › pages › problems-with-split-king-adjustable-beds
4 Problems with Split Kings (& How to Solve Them) | GhostBed®
You can also pick up a “bed wedge” or “gap filler.” This accessory is usually made from memory foam. You can place it between your mattresses to smooth things out.
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Walmart
walmart.com › home
Split King Gap Filler Adjustable Bed
From $51.00Split 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)
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eBay
ebay.com › home & garden › bedding › mattress pads & toppers
Split King Gap Filler for Adjustable Bed, Wider Mattress Bridge-Twin/Twin XL ... | eBay
Split King Gap Filler for Adjustable Bed, Wider Mattress Bridge-Twin/Twin XL ...
Split King Gap Filler for Adjustable Bed, Wider Mattress Bridge-Twin/Twin XL ...Split King Gap Filler for Adjustable Bed, Wider Mattress Bridge-Twin/Twin XL ...
Price   $24.99
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Wayfair
wayfair.com › keyword.php
Split King Bed Gap Filler | Wayfair
Say Goodbye to Bed Gaps: Adjustable Comfort & Handy Storage:This bed gap filler fills gaps of 0-7 inches between your headboard and mattress, preventing items and pillows from sliding off.
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Amazon
amazon.com › ask › questions › Tx2WD7BYM0WPKHY
Amazon.com: Customer Questions & Answers
Split King Gap Filler for Adjustable Bed – Mattress Slide Stopper | Prevent Sliding with Anti-Slip…
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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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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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Continental Sleep
continentalsleep.com › products › bed-bridge-pad-mattress-converter-kit-gap-filler-for-adjustable-mattresses-good-for-guests-stay-overs-family-room-white
Bed Bridge Pad | Mattress Converter Kit | Gap Filler for Adjustable Ma
Upgrade your sleeping arrangements with our Twin to King and Twin XL to King Bed Converter Kit, a practical and comfortable solution for creating a seamless king-sized bed from two twin mattresses. Featuring a 11.8-inch-wide bed bridge, this innovative kit effortlessly closes the gap, ensuring a smooth and supportive surface for uninterrupted rest.
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Target
target.com › s › mattress+gap+filler
"mattress gap filler" : Target
Shop Target for mattress gap filler you will love at great low prices. Choose from Same Day Delivery, Drive Up or Order Pickup plus free shipping on orders $35+.