The quick verdict

A vertical bed bridge is a foam wedge. It sits in the gap between your mattresses and fills it with foam. It is cheap and easy to find. But it creates a bump you can feel, it does not stop mattresses from sliding, and the foam wears out in weeks.

A horizontal bed bridge is a mattress connector. It wraps around both mattresses underneath and physically pulls them together. The gap cannot form. The mattresses cannot slide. You feel nothing under the sheets. It lasts for years.

Our recommendation: If you want a real solution, choose a horizontal bed bridge. The Bedbinder Deluxe is the original horizontal bed bridge, trusted by 15,000+ couples.

Side-by-side comparison

Feature Vertical (foam wedge) Horizontal (Bedbinder)
How it works Sits IN the gap Wraps UNDER both mattresses
Fills the gap Yes, temporarily Yes, permanently
Stops mattress sliding No Yes
Creates a bump Yes, noticeable No, completely flat
Visible under sheets Sometimes Never
Works on adjustable beds Poorly (pops out) Yes, stays in place
Durability Weeks to months Years
Installation time 1 minute 1 minute
Different mattress heights Limited Up to 3 cm difference
Sleep trial Rarely offered 30 days (Bedbinder)

What is a vertical bed bridge?

A foam wedge placed in the gap between two mattresses

The foam wedge approach

A vertical bed bridge is a strip of foam shaped like a long wedge. You press it into the gap between two mattresses. It fills the gap visually and costs between 10 and 30 euros.

The problem: foam compresses under body weight. After a few weeks, the wedge sinks and you feel a dip where the gap used to be. The mattresses still slide apart because the foam has no grip. On adjustable beds, the wedge pops out when you raise the head or foot section.

A foam wedge is not a bed bridge. It is a gap filler. It treats the symptom, not the cause.

The Bedbinder Deluxe installed under two mattresses, creating one smooth surface

What is a horizontal bed bridge?

The Bedbinder approach

A horizontal bed bridge is a wide strap system that goes around or under both mattresses. It physically pulls them together so the gap cannot form. The mattresses cannot slide apart because they are locked in place by the straps.

The Bedbinder Deluxe is the most popular horizontal bed bridge in Europe. You place it over the middle of both mattresses, pull the straps underneath, and click the buckles. Done in under a minute. No tools needed.

The result: one smooth sleeping surface. No gap. No bump. No sliding. Invisible and unfeelable under the sheets. It works on regular beds, boxsprings, and adjustable beds.

Which one should you choose?

Choose a foam wedge if:

  • You need a temporary fix for a guest bed
  • You only care about filling the gap visually
  • You do not mind replacing it every few months

Choose a horizontal bed bridge if:

  • You want to permanently eliminate the gap
  • Your mattresses slide apart during the night
  • You sleep on an adjustable bed
  • You want a solution that lasts for years
  • You do not want to feel any bump or ridge

For most couples, a horizontal bed bridge is the better choice. It solves both problems (gap and sliding) at the source, and you only buy it once.

Frequently asked questions

A vertical bed bridge (foam wedge) sits IN the gap between mattresses and fills it with foam. A horizontal bed bridge (like the Bedbinder) wraps around or under both mattresses and physically connects them. The horizontal type solves both the gap and mattress sliding. The vertical type only fills the gap temporarily.

A horizontal bed bridge is better for most couples. It solves the root cause by connecting the mattresses so the gap cannot form. A foam wedge only treats the symptom.

No. A foam wedge sits in the gap but has no mechanism to hold the mattresses together. The mattresses continue to drift apart. A horizontal bed bridge like the Bedbinder uses straps to physically hold both mattresses in place.

No. A horizontal bed bridge like the Bedbinder sits underneath the mattresses, not between or on top of them. It is completely invisible and unfeelable. A foam wedge sits on the mattress surface and creates a noticeable bump.

Ready for the real solution?

The Bedbinder Deluxe is the original horizontal bed bridge from the Netherlands.

15,000+ couples trust it. 30-day sleep trial. Free shipping in NL and BE.

Order the Bedbinder Deluxe

Learn more: what is a bed bridge | mattress connector | Bedbinder vs foam wedge