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
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.
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
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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
01:07
Watch If you have a split king, this bed bridge will fill the gap ...
Twin to King Bed Bridge,Split King Gap Filler for Adjustable ...
03:18
Split King Mattress Gap - Easy Fix - YouTube
03:42
HOW TO TURN A TWIN BED INTO KING // Mattress Converter - YouTube
08:54
How to Make Your Split King Bed - YouTube
01:25
CKI Create A King Mattress Connector - YouTube
Foam Factory
foambymail.com › product › foam-bed-bridge.html
Poly Foam Bed Bridge | Foam Factory, Inc.
The thickness of the foam bed bridge is 3". This tapers down to 1/4" on both the left and right of the foam bed bridge. The part of the product that drops between the mattresses is about 1-1/4" thick.
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
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
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October 14, 2023Best bridge/gap filler for Climate360 Split King
I wish one would work! I bought a thing that goes between with a strap to pull around to get them closer. Garbage. Now I just stuff pillows in the middle. It really sucks that there's no way to make it feel like an actual king. I would never do split king again, but now I'm stuck with it. If you find something that works, please post! More on reddit.com
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June 4, 2024Help with split king setup
My wife and I have a split king, with split adjustable bases. My mattress is about an inch thicker than hers. We evened it out by putting anti-vibration pads under her base. The pads are a dense rubber and don’t squish down like floor protector pads do.
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April 3, 2019Walmart
walmart.com › home
Split King Gap Filler Adjustable Bed
Shop for Split King Gap Filler Adjustable Bed at Walmart.com. Save money. Live better
GhostBed®
ghostbed.com › pages › problems-with-split-king-adjustable-beds
4 Problems with Split Kings (& How to Solve Them) | GhostBed®
Our split king mattresses come with connecting straps that you can use for this. If you have laminate, hardwood or tile flooring, pick up some non-slip furniture coasters. Furniture coasters will create friction and keep your bases from migrating apart as you get in and out of bed.
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
GoodBed
goodbed.com › mattress-questions › 2237 › how-do-we-keep-our-split-king-mattress-from-separating-in-the-middle
Mattress Question: "How do we keep our split king mattress from separating in the middle?" - GoodBed.com
My husband bought a split king bed and loves it. However, keeping it from sliding apart is an issue when you want to meet in the middle!!
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!!
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 - A bed bridge is precisely what it sounds like: an accessory, typically made of foam, that bridges the gap between the two twin segments of your split king.
Saatva
saatva.com › home › 6 ways to keep a split king mattress together
How to Keep a Split King Mattress Together | Saatva
You can install a mattress bridge, add a headboard, secure and connect the legs of the frames to keep the foundation steadfast, put non-slip mattress pads between the mattress and the foundation, or use a mattress topper.
Amazon
amazon.com › Briliantwerk-Converter-Innovative-Adjustable-Installed › dp › B0CZ9FS269
Amazon.com: Briliantwerk Twin to King Bed Converter | No Slipping | Innovative Solution as Bed Bridge for Couples & Families | Split King Gap Filler for Adjustable Bed, Installed in < 5 Min : Home & Kitchen
UNIVERSAL FIT FOR STANDARD BEDS – Our bridge is designed to seamlessly join two mattresses, serving as an ideal split king gap filler or twin to king converter, for comfortable and unified sleep.
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.
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.
Sleepopolis
sleepopolis.com › home › sleep product reviews › best mattress joiners
Best Mattress Joiners (2026) | Sleepopolis
April 3, 2023 - This belt-like strap has a strong metal buckle that’s heavy-duty, but also extremely easy to wrap around two twin beds in order to transform them into a single king. ... The ease of use here is the big draw. The simple seatbelt-style clasp on the connecting strap is an elegant way to hold mattresses together. The 10″ width and velcro back on the bridge covers more area than competitive mattress joiners, which helps keep it from slipping between the two mattresses.
Bedbinders
bedbinders.com › home
Home - Bedbinders
May 2, 2024 - Yes, it’s very adaptable! The Bedbinder can comfortably bridge mattresses even if they differ in height, keeping them snugly together.
Sleep Number
sleepnumber.com › home
Shop Split King Mattresses | Sleep Number
Our Split King-sized mattresses let you choose your ideal firmness on each side with generous space for both of you.
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…
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.