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With the Bedbinder: the couple lies together in the middle of one bed, no gap

DaniëlDaniël, founder of Bedbinder Deluxe

Mattress gap filler: fill the gap for a night, or close it for good

A gap filler fills the space between two mattresses just fine, for a while. Want them together for good? Tie them with the Bedbinder Deluxe bed bridge in 60 seconds, and under your sheet you can't feel it.

4.8on Google
  • Nothing in the gapno foam to push back every morning
  • No ridge in the middleflat under your fitted sheet
  • Stays puteven when you both toss and turn
  • On in 60 secondsso you feel the difference tonight
Without the Bedbinder: the mattresses have drifted apart and there is a gap in the middle With the Bedbinder: the couple lies together in the middle of one bed, no gap

You were looking for something to put in the gap. The fix goes over both mattresses and holds them together.

Google review
“… I tried several things, foam wedges that sink in and straps that come loose, but nothing really worked. … The mattresses are locked tight together, you don't feel the seam anymore …”
Translated from Dutch · Show original
“… Ik heb verschillende dingen geprobeerd, foam wiggen die wegzakken en spanbanden die loslaten, maar niets werkte echt. … De matrassen zitten muurvast aan elkaar, je voelt de naad niet meer …”
Rosa

What customers notice once the gap is gone

Is the gap really gone?
“I was skeptical at first, but Bedbinder Deluxe hit the mark right away. No gap, everything stays tight. …”
Translated from Dutch · Show original
“Ik was eerst sceptisch, maar Bedbinder Deluxe was meteen raak. Geen gap, alles blijft strak. …”
Do they really stay together?
“… The mattresses really stay together well …”
Translated from Dutch · Show original
“… De matrassen blijven echt goed tegen elkaar liggen …”
Will I feel or see it?
“… No more hassle with shifting mattresses or that annoying gap in the middle. It is easy to install and stays invisible under the sheet. …”
Translated from Dutch · Show original
“… Geen gedoe meer met verschuivende matrassen of die vervelende spleet in het midden. Het is makkelijk te installeren en blijft onzichtbaar onder het laken. …”

What is a mattress gap filler?

A mattress gap filler is a foam strip or wedge that sits in the gap between two mattresses. It fills that space while the mattresses stay put, but it doesn't hold them together, so when they slide apart, the gap comes back. The Bedbinder Deluxe bed bridge works differently: a wide band goes over both mattresses, and three straps underneath hold them together.

Many people search for it as a bed binder. Its name is the Bedbinder.

A gap filler is also called a bed gap filler, a mattress wedge or a foam bed bridge.

See it on a bedUpdated

The gap filler isn't the problem. Your mattresses are moving.

At night the foam sits neatly in the gap. But every time one of you turns over, the mattresses slide a little further apart. So by morning the gap filler has sunk into the crack, or it's lying crooked on one side.

You meet in the middle, but you lie on a ridge of foam.
So every morning you push the mattresses back and the foam back in.
And on a box spring the gap filler simply slides along with them.

A gap filler only fills the space, so it can't stop two loose mattresses from drifting. But once they're tied together, there's no gap left to fill.

From gap filler to Bedbinder in 60 seconds

No tools, and it takes 60 seconds. The first time, a second pair of hands makes lifting the mattresses easier.

Gap filler out, mattresses together
Step 1

Gap filler out, mattresses together

Take out the gap filler and push the mattresses as close together as you can. Lay the Bedbinder across the middle of the bed: straps on one side, buckles on the other.

Straps underneath
Step 2

Straps underneath

Lift the side of each mattress a little and pull the straps under it, over to the buckle side.

Buckle up and tuck under
Step 3

Buckle up and tuck under

Thread the straps through the buckles and pull them snug. Not too tight: once the mattresses can't move apart, it's right. Then tuck the buckles under the mattress.

How the Bedbinder goes over the bed and the straps go underneath

And then?

Make the bed as one bed: a mattress pad and one large fitted sheet over both, because your two mattresses are now one surface. In the first week the band can settle a little, so check it then and tighten the straps a touch if needed.

Will it fit my bed?

Only the width and the height matter: 55 to 79 inches (140 to 200 cm) wide in total, with mattresses 6 to 14 inches (15 to 35 cm) thick. How long your bed is makes no difference, and one Bedbinder is enough, also on a king. Does only the head section move? Then place the Bedbinder a little lower, between the hinge points.

Box spring with two mattressesFits
Two twin beds pushed togetherFits
Bed frame with wooden sidesFits
Split king, only the head movesFits
Split king, head and foot both moveNot recommended

What changes once nothing needs filling

No ridge in the middleThe Bedbinder is 0.04 inch (0.1 cm) thin and lies flat across both mattresses, so the middle is a place to lie again.
No pushing them back in the morningThe mattresses stay together, so you don't have to shove them back into place before you make the bed.
One fitted sheet over everythingTwo mattresses become one surface, so one large fitted sheet goes right over both.

When a gap filler is enough, and when you need the Bedbinder

  • Also on a box spring, where a gap filler slides along with the mattresses
  • Also on any mattress: foam, innerspring, latex or hybrid
  • Also with a topper: around the mattresses, or around mattresses and topper together
  • Also on a king: one Bedbinder is enough

When not

Your bed frame holds the mattresses in place.Wooden sides that keep them from moving? Then a foam gap filler can do the job, though you'll feel a bump in the middle.
Your gap is at the headboard or the wall.That's a different gap. The Bedbinder closes the gap between two mattresses, not the one behind your bed.
You have one big mattress.One mattress has no gap, so there's nothing to fill or hold together.
Head and foot both move separately.Then we don't recommend it, but Daniël will gladly help you find another way, free of charge.

Tried something else first? So did they.

4.3Excellent on Trustpilot

TrustpilotJuly 2026

Will it work after years of hassle?

“For a long time we had trouble with two mattresses that kept sliding apart. … Tried all sorts of things, but nothing really worked. With the Bedbinder DeLuxe the mattresses finally stay neatly against each other.”
Translated from Dutch · Show original
“Wij hadden al lange tijd last van twee matrassen die steeds uit elkaar schoven. … Van alles geprobeerd, maar niets werkte echt goed. Met de Bedbinder DeLuxe blijven de matrassen eindelijk netjes tegen elkaar liggen.”
TrustpilotAugust 2026

Can we lie in the middle again?

“Finally no more gap between our mattresses … Especially if you like to lie a bit more in the middle of the bed, that was pretty annoying for us. Since we started using the Bedbinder DeLuxe, the mattresses stay together well.”
Translated from Dutch · Show original
“Eindelijk geen gleuf meer tussen onze matrassen … Vooral als je graag wat meer in het midden van het bed ligt, was dat bij ons behoorlijk irritant. Sinds we de Bedbinder DeLuxe gebruiken blijven de matrassen goed bij elkaar.”
TrustpilotJune 2026

Does it last?

“I have been using it for 4 years and really recommend it. I was always wrestling with that gap, sliding again and a gap again. This solves it completely”
Translated from Dutch · Show original
“Ik gebruik hem al 4 jaar en is echt een aanrader. Ik lag altijd te stoeien met dat gat en weer schuiven en weer een gat. Dit lost het helemaal op”
Order the Bedbinder

90-night trial

Common questions about mattress gap fillers

Don't see your question? Just ask Daniël. He answers it himself, within one business day.

What is a mattress gap filler?

A mattress gap filler is a foam strip or wedge that sits in the gap between two mattresses. It fills that space while the mattresses stay put, but it doesn't hold them together, so when they slide apart, the gap comes back.

How do you fill a gap between two mattresses?

For a night, lay a foam gap filler in it. To close it for good, hold the two mattresses together: the Bedbinder Deluxe bed bridge goes across both, with three straps underneath, so the gap can't open again.

Is there a pad to fill the gap between two mattresses?

Yes, a foam gap filler pad or wedge fills it, and a topper can cover the seam. Neither keeps the mattresses from moving apart, though. If yours slide, tie them together with the Bedbinder first, then put the topper on top if you like.

Can you make a DIY bed gap filler?

Yes, a rolled towel or a pool noodle in a pillowcase fills the gap for a night. But like a store-bought gap filler, it connects nothing, so the gap returns as soon as the mattresses drift.

Does a mattress gap filler stop mattresses from sliding apart?

No. A gap filler only fills the space between the mattresses. To keep them from sliding apart, they have to be held together, which is what the Bedbinder does.

Does a gap filler work on a box spring?

No, not for long. On a box spring the mattresses slide over the smooth fabric, and the gap filler slides along with them. There you need something that holds the mattresses together.

Is the Bedbinder a gap filler?

No. The Bedbinder Deluxe bed bridge doesn't sit in the gap but goes over both mattresses, and three straps underneath hold them together. So there is no gap left to fill.

Does a mattress connector stop the mattresses from sliding apart too?

Yes. The Bedbinder Deluxe connects both mattresses with three straps underneath, so they move together instead of drifting apart. That's why the gap stays closed as well.

How do you fix a zip and link mattress gap in the middle?

Hold the two mattresses together. A zip and link bed is two single beds zipped side by side, but the mattresses on top can still pull apart and leave a gap in the middle. The Bedbinder goes across both mattresses with three straps underneath, so the gap closes, as long as they measure 140 to 200 cm (55 to 79 inches) wide in total.

Can you feel the Bedbinder when you lie on it?

No. The Bedbinder is 0.04 inch (0.1 cm) thin and lies flat across the middle, so under your fitted sheet you don't feel it.

Does it work on a split king adjustable bed?

Yes, if only the head section moves. Place the Bedbinder a little lower, on the flat part between the hinge points. If the head and the foot both move, we don't recommend it.

Will it fit my bed?

Yes, if your two mattresses measure 55 to 79 inches (140 to 200 cm) wide in total and are 6 to 14 inches (15 to 35 cm) thick. There is one size, and the length of your bed makes no difference.

How long does it take to put on?

60 seconds. Lay the Bedbinder across the middle of the bed, pull the three straps under both mattresses, thread them through the buckles and pull them just snug enough that the mattresses can't move apart. No tools needed.

Can I wash the Bedbinder?

Yes. The band is machine washable at 30 °C (86 °F). It opens on both sides, hook-and-loop on one side and buckles on the other, so you can wash it without threading everything under the mattresses again.

How much does the Bedbinder cost?

$57.00, with free shipping. You also get a 7-year warranty on the buckles: if one breaks, you get a whole new Bedbinder.

Why Daniël didn't put anything in the gap

In 2007, after a night at a hotel by SnowWorld in Landgraaf, it hit me in the shower the next morning: those mattresses had to be tied together. Still, back home I first made the rounds of the bed stores. They offered me foam bridges and non-slip pads. But filling the gap wasn't the point, so I made something that holds the mattresses together myself.

Daniël, inventor of the BedbinderInvented in 2007, sold since 2014. Daniël answers customer questions himself.

Would you rather have no gap to fill?

Then you don't need a gap filler, just one Bedbinder around both mattresses. The middle stays flat, nothing slides, and tonight you can meet in the middle again.

$57.00
  • 90-night trial
  • 7-year buckle warranty
  • Free shipping
  • Ships right away
$57.0090-night trial
Order the Bedbinder