An anti-slip mat (also called a gripper pad, rubber mat, or non-slip liner) is a thin rubber or PVC sheet that you place between your mattress and the bed frame. The textured surface creates friction, making it harder for the mattress to slide around.

They cost 5-15 euros and come in different sizes. You can cut them to fit your bed. They are easy to find at home goods stores and online.

• Adds friction between the mattress and the bed frame
• Slows down mattress sliding on smooth surfaces
• Cheap and easy to install
• Works on single mattress setups (one mattress on a frame)

For a single mattress that slides on a smooth bed frame, an anti-slip mat is a decent solution. It adds enough grip to keep the mattress roughly in place.

The problems start when you have two mattresses side by side. An anti-slip mat only adds friction between the mattress and the frame. It does nothing about the gap between the mattresses.

• Does not connect the two mattresses to each other
• The mattresses can still slide apart sideways
• Does not fix or fill the gap between mattresses
• Rubber can wear down over time, reducing effectiveness
• Some materials trap heat and moisture under the mattress

An anti-slip mat fights friction. But when two mattresses slide apart, the problem is not friction with the frame. The problem is that the mattresses are not connected to each other.

For two mattresses, you need two things: a way to connect them (so they cannot slide apart) and a way to grip the frame (so the whole bed stays in place).

The Bedbinder Deluxe handles the first part. It wraps around both mattresses and pulls them together. The gap cannot form. The mattresses cannot slide apart.

An anti-slip mat handles the second part. It adds grip between the connected mattresses and the bed frame.

Together, they create the most stable bed setup possible. The mattresses stay together and the whole bed stays in place. But if you can only choose one, the Bedbinder is the more important piece. Connecting the mattresses solves the bigger problem.