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
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
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
2
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.
2 of 6
2
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
04:35
Best Split King Adjustable Bases - Best Bed Picks Worth The ...
03:18
Split King Mattress Gap - Easy Fix - YouTube
06:38
Split King Mattress Concerns: Will I Fall In The Middle? - YouTube
01:07
Watch If you have a split king, this bed bridge will fill the gap ...
How to Eliminate Mattress Gaps with Bedbinder Mattress Strap
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
Wayfair
wayfair.com › keyword.php
Split King Bed Gap Filler | Wayfair
Turn two Twin XL mattresses into a comfortable King with this bed bridge converter kit. Designed for adjustable beds, it creates a stable, seamless connection using a foam gap filler and securing straps.
Reddit
reddit.com › r/sleepnumber › best bridge/gap filler for climate360 split king
r/sleepnumber on Reddit: Best bridge/gap filler for Climate360 Split King
June 4, 2024 -
I want to link the two sides of the adjustable base and use a bed-bridge under a king mattress pad to make the split king more like a king. Any suggestions on the best bridge/gap filler to get? The angled edges of the two mattresses seem to yield a bigger gap at the top than what I see most bed bridges advertised for.
Top answer 1 of 2
2
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!
2 of 2
1
If you want to sync both sides to move together you just need to use a king fitted sheet. In my experience anything you put in the gap will force it wider over time. If you want to spend for a king size Climate mattress pad (breathable) that would help, too. Ordinarily I’d suggest a king topper pad to eliminate the gap but not on a Climate 360 since it would black the airflow.
Walmart
walmart.com › home
Split King Gap Filler Adjustable Bed
Shop for Split King Gap Filler Adjustable Bed at Walmart.com. Save money. Live better
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
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. This bed bridge stops the air flow and prevents you from complaining that you've fallen into a crack.
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.
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
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 a bed bridge in the center gap to create a smooth transition between surfaces. Top everything with a single king-sized mattress topper that unifies the sleep surface. This layered approach addresses the gap problem from multiple angles for maximum effectiveness. Make sure all your solutions work together—for example, choose a mattress topper thin enough to allow adjustable bases to work properly if you use them.
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!!
eBay
ebay.com › home & garden › bedding › mattress pads & toppers
9” Wide Bed Bridge Foam Padded Split King Gap Filler for Adjustable Bed w/Strap | eBay
9” Wide Bed Bridge Foam Padded Split King Gap Filler for Adjustable Bed w/Strap
This bed gap filler is the perfect solution for filling the gap between 2 beds, easily transforming 2 twin beds into one seamless king bed. The T-shape wedge allows it to fit firmly into the gap, giving you enough support and comfort.
Price US$34.19
Amazon
amazon.com › ask › questions › Tx13H5K5F1NUWS1
Amazon.com: Customer Questions & Answers
I had bought a split queen adjustable bed, but didn’t realize that if you get close to the center where they come together it slips a little, so I bought the kit and the center connect with the strap and also bought the mattress protector . Put them on the bed and then put my sheets on. Slept on it a couple of nights and I must say I slept great. ... Only if you put blankets in the crack . Make sure the beds are as close as you can . Sleep number king ...
Amazon
amazon.ca › Bed-Bridge-Hypoallergenic-Filler-Twin-Family-6-3in › dp › B07WG8GL8X
Foam Split King Gap Filler for Adjustable Bed, Twin Bed Connector ...
【Package Included】a special foam (6.3 inch Wide, 6.5 feet Long), long bed strap (30 feet) ; 2 Eye Sleeping Masks and a Black Storage Bag for free. 【Increase Sleeping Space】You can using this hidden gap filler between the crack of your two beds，which Connect two single mattresses into one double bed.
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.
DCUM Forum
dcurbanmom.com › jforum › posts › list › 1242118.page
Split King Adjustable Bed - gap filler?
Subject: Split King Adjustable Bed - gap filler? quote · Anonymous · report · 11/26/2024 16:35 · Subject: Split King Adjustable Bed - gap filler? quote · Anonymous · report · 11/26/2024 16:46 · Subject: Split King Adjustable Bed - gap filler? quote · Anonymous ·
Bedbinders
bedbinders.com › home
Home - Bedbinders
May 2, 2024 - Learn how easy and fast Bedbinders transforms a double bed into a king-size sleep heaven. Sorry, your browser doesn't support embedded videos. 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.
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+.
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. This bed bridge stops the air flow and prevents you from complaining that you've fallen into a crack.
Foam Factory
foambymail.com › product › foam-bed-bridge.html
Poly Foam Bed Bridge | Foam Factory, Inc.
Purchased this bridge to fill in the gap of my split King size adjustable bed it works great stopping the draft and also allowing me to use regular deep pocket king sized sheets