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 $67.00
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
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.
Videos
01:07
Watch If you have a split king, this bed bridge will fill the gap ...
00:57
Watch The Samuel - Bed Bridge and Mattress Gap Filler Twin to King ...
HOW TO TURN A TWIN BED INTO KING // Mattress Converter
03:18
Split King Mattress Gap - Easy Fix - YouTube
01:38
How To Keep XL Twin Mattresses From Separating (Split King Adjustable ...
How to keep a split king mattress from sliding?
Use a Bedbinders connector specifically designed for split kings and adjustable bases. Place non-slip material under both mattresses where they contact the foundation. Ensure both bases are properly synced if you have an adjustable bed. Check that your mattresses are the correct size for your foundation. Avoid DIY solutions which can restrict adjustable base functionality.
bedbinders.com
bedbinders.com › home
Bedbinders.com – Bed bridge
How to keep two mattresses from sliding apart?
Use a Bedbinders mattress connector between the mattresses (most effective solution). Place the connector at mid-mattress height, typically 4-8 inches from the top. Add non-slip material under both mattresses for added stability. Ensure your bed frame has adequate center support to prevent foundation separation. Use a unified mattress pad across both surfaces if additional stability is needed.
bedbinders.com
bedbinders.com › home
Bedbinders.com – Bed bridge
Why does my mattress slide to one side?
Your mattress slides due to: Smooth mattress bottom against equally smooth foundation creating minimal friction, Uneven weight distribution (especially with couples), Sloped flooring in the bedroom, Regular movement during sleep creating gradual displacement, Modern synthetic mattress covers designed for easier packaging but with less grip.
bedbinders.com
bedbinders.com › home
Bedbinders.com – Bed bridge
Bedbinders
bedbinders.com › home
Bedbinders.com – Bed bridge
May 2, 2024 - Yes, it’s very adaptable! The Bedbinder can comfortably bridge mattresses even if they differ in height, keeping them snugly together.
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
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
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.
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.
Wayfair
wayfair.com › keyword.php
Split King Bed Bridge | Wayfair
Turn two mattresses into one luxurious king with this smart bed bridge converter. Designed for easy setup and stable connection, it ensures guests enjoy a seamless sleep experience.
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
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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.
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.
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
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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.
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 $34.19
GhostBed®
ghostbed.com › pages › problems-with-split-king-adjustable-beds
4 Problems with Split Kings (& How to Solve Them) | GhostBed®
Some of the most common “problems” with split king adjustable bases are easily fixable. Here, we’ll share how to keep your mattresses from sliding and more.
Amazon
amazon.com › split-king-gap-filler-adjustable-bed › s
Amazon.com: Split King Gap Filler For Adjustable Bed
split king adjustable bed frame · Previous · 1 · 2 · 3 · 4 · Next · Visit the help section or contact us · Go back to filtering menu · Skip to main search results · Popular Shopping Ideas · Sheet Sets · Wedge · Bed Bridge · Twin Xl · Adjustable ·
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
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.
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 - 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.
eBay
ebay.com › home & garden › furniture › beds & headboards › beds & bed frames
Bed-Bridge, Split King Gap Filler for Adjustable Bed, Twin to King Bed Converter | eBay
Bed-Bridge, Split King Gap Filler for Adjustable Bed, Twin to King Bed Converter
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). Proprietary Gap Filling System-The piece of foam attached special material to the twin bed connector is very sturdy with inherent structural integrity.
Price $49.29
Sleepopolis
sleepopolis.com › home › sleep product reviews › best mattress joiners
Best Mattress Joiners (2026) | Sleepopolis
April 3, 2023 - This all-in-one conversion kit gives you everything you need to join your mattress in one handy, affordable package. Featuring a bed bridge, a 33-foot long strap and a storage case, you’re able to not only join two twin beds to make a king, but even two queen-sized mattresses for an even larger sleeping area.
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 - For example, the ErgoSportive king-size smart bed has a LED-lit headboard (with a sunrise/sunset feature) that keeps its two sides from sliding apart. Alternatively, you could use headboard brackets to attach a headboard to your split king bed. Another solution is to try a bed bridge, which creates a bridge between the two mattresses.
Bed Bath & Beyond
bedbathandbeyond.com › bedding › mattress pads and toppers › mattress toppers
74.8" & 80" Bed Bridge Pad, King Bed Converter, Split King Gap Filler for Adjustable, White - Bed Bath & Beyond - 42286103
Simply place the bridge between the mattresses and cover with a fitted king sheet or mattress pad for extra stability.Crafted from high-density foam and breathable, skin-friendly fabric, the kit combines durability with exceptional comfort.