A topper is a thick mattress pad that lies on top of both mattresses. It covers the gap and creates one sleeping surface. But it is heavy, expensive (150-400 euros), and the mattresses underneath still slide apart. Over time, the topper sags into the widening gap. You also lose the individual firmness of each mattress.
The Bedbinder Deluxe connects both mattresses underneath with straps. The gap cannot form. The mattresses cannot slide. Each person keeps their own mattress and comfort level. It costs 49.95 euros and lasts for years.
Our verdict: A topper hides the problem. The Bedbinder solves it. If you want to keep your own mattress firmness and actually fix the gap, the Bedbinder is the better choice.
| Feature | Topper | Bedbinder Deluxe |
|---|---|---|
| How it works | Lies ON TOP of both mattresses | Wraps UNDER both mattresses |
| Fixes the gap | Covers it (temporarily) | Eliminates it (permanently) |
| Stops mattress sliding | No | Yes |
| Individual mattress firmness | Lost (topper changes feel) | Preserved (works underneath) |
| Weight | 10-20 kg | Under 1 kg |
| Washing | Difficult (large, heavy) | Easy (machine washable) |
| Adjustable beds | Does not work | Works perfectly |
| Price | 150-400 euros | 49.95 euros |
| Durability | 2-3 years | 5+ years |
| Installation | Heavy lifting, 2 people | Under 1 minute, 1 person |
| Sleep trial | Varies | 30 days |
A topper seems like a logical fix. Cover both mattresses with one thick pad, and the gap disappears. But in practice, toppers create more problems than they solve:
A topper sits on top of the mattresses but does not connect them. The mattresses continue to drift apart underneath. Over weeks, a valley forms in the topper right where the gap is. You end up sleeping in a dip.
The whole point of two mattresses is that each person can choose their own firmness. A topper adds a new layer on top that changes how both mattresses feel. If one of you likes firm and the other likes soft, a topper forces you to compromise.
A king-size topper weighs 10-20 kg. It costs 150-400 euros. Washing it is a project. And it does not even fix the root cause of the gap.
If you have an adjustable bed, a topper is not an option. You cannot raise the head section with a stiff topper across both mattresses. The Bedbinder works underneath, so it stays in place even when you adjust the bed.
The Bedbinder fixes the gap at the source. Instead of covering it with a heavy pad, it connects the mattresses so the gap cannot form.
A topper covers the gap by lying on top of both mattresses. It hides the gap, but the mattresses underneath still slide apart. The topper sags into the widening gap over time. A Bedbinder connects the mattresses underneath so the gap cannot form.
Yes. A good king-size topper costs 150-400 euros. The Bedbinder Deluxe costs 49.95 euros. The Bedbinder also lasts longer and actually solves the root cause of the gap.
No. The Bedbinder works underneath the mattresses. Each person still sleeps on their own mattress with their preferred firmness. A topper adds a new sleep surface that changes how both mattresses feel.
The Bedbinder Deluxe is lighter, cheaper, and solves the problem a topper cannot.
49.95 euros. 30-day sleep trial. Free shipping in NL and BE.
Order the Bedbinder DeluxeLearn more: Bedbinder vs foam wedge | horizontal vs vertical | what is a bed bridge