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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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?

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Wayfair
wayfair.com › keyword.php
Split King Bed Gap Filler | Wayfair
The core of the wedge pillow is made from top-quality foam, ensuring a firm yet flexible structure that perfectly fills any gaps. The foam is responsive and adapts to the shape of the gap, providing a snug fit between your mattress and the headboard ...
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Amazon
amazon.com › s
Amazon.com: Sleep Number Split Top King Gap Filler
Amazon.com: sleep number split top king gap filler
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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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Amazon
amazon.com › king-size-gap-filler › s
Amazon.com: King Size Gap Filler
Check each product page for other buying options. Price and other details may vary based on product size and color · Bedluxe King Wedge Pillow Headboard (76"x10"x6"), Bed Wedge Pillow for Headboard, Foam Headboard Pillow, Bed Gap Filler King - Fill The Gap (0-7"), Mattress Gap Filler (White) ...
Find elsewhere
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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
PERFECT FOR ALL BED TYPES: Designed to work flawlessly with all bed types, including split king, adjustable queen, and twin XL beds, Bedbinders hold your mattresses securely together, regardless of movement or position. QUICK & SIMPLE INSTALLATION: Transform your sleeping setup in minutes. Bedbinders' user-friendly design allows for easy installation without the need for tools, giving you more time to enjoy a comfortable, gap-free bed.
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Amazon
amazon.com › s
Amazon.com: Gap Filler For Sleep Number Top Split King Size Bed Mattress
Amazon.com: gap filler for sleep number top split king size bed mattress
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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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Amazon
amazon.com › king-size-bed-gap-filler › s
Amazon.com: King Size Bed Gap Filler
Check each product page for other buying options. Price and other details may vary based on product size and color · Bedluxe King Wedge Pillow Headboard (76"x10"x6"), Bed Wedge Pillow for Headboard, Foam Headboard Pillow, Bed Gap Filler King - Fill The Gap (0-7"), Mattress Gap Filler (White) ...
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YouTube
youtube.com › watch
How to Make Your Split King Bed - YouTube
A split king bed has two twin extra long mattresses, and they're usually atop two twin extra long adjustable (or power) bed bases. They're great if your part...
Published   January 10, 2020
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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 - A single mattress topper that spans both mattresses creates a unified sleep surface and adds stability. Place the king topper across both mattresses to bridge the gap and create a smooth transition between the two sides.
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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
Vekkia
No More Gaps. Softness And Comfort Instead - Made of high-quality thickened foam topped with long-lasting "T" wedge offers stability over the gap and premium comfort.
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Amazon
amazon.com › gap-filler › s
Amazon.com: Gap Filler
Seal out air, moisture, and pests with our high-performance gap filler solutions. Expand foam, flexible silicone, and sturdy steel wool options available.
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Amazon
amazon.com › ALLFULL-Adjustable-Converter-Connector-75in×10in › dp › B0DMJ6Y3B7
Amazon.com: ALLFULL Split King Gap Filler for Adjustable Bed, Bed Bridge Twin to King Bed Converter Kit, Mattress Connector Combine Twin Beds to King with Washable Cover for Stayover, Family Room(75in×10in) : Home & Kitchen
Gap Filling System: This twin to king bed converter is sturdy with inherent structural integrity and hardly collapses and slides down between the mattresses and is best suited for bed seams up to 2 inches in width,It works for Twin, Twin XL, ...
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Amazon
amazon.com › ask › questions › Tx17QPK0MW5LUO5
Amazon.com: Customer Questions & Answers
Split King Gap Filler for Adjustable Bed – Mattress Slide Stopper | Prevent Sliding with Anti-Slip…
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GhostBed®
ghostbed.com › pages › problems-with-split-king-adjustable-beds
4 Problems with Split Kings (& How to Solve Them) | GhostBed®
Keep in mind that if you opt for a gap filler, however, you won't be able to operate your two bases independently. Try using a king-sized mattress topper. Our topper comes with a cover that features our signature GhostGrip elastic band around the edges, which helps keep things snugly in place.
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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