Mattress Motion Isolation
Memory foam uses heat to contort to the shape of your body. This leads to the fact that memory foam mattresses have great motion isolation. Everyone has seen a example of jumping on one side of the mattress without spilling a glass of wine on the other side. Depending on the thickness and density of the memory foam you should expect great motion isolation.
Latex sinks in just like memory foam but always provides a reflex. This provides great back support but tends to be a little bouncy. With that being said the motion isolation is still pretty good. Depending on the thickness and density of the latex you should expect good motion isolation.
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Motion isolation can vary greatly for innerspring beds depending mainly on the type of coil used. Bonnell / open coils and continuous coils tend to provide fair-to-poor motion isolation, while more sophisticated coils such as pocket or offset tend to provide at good to great motion isolation. In addition, the presence of memory foam and or latex on an innerspring bed helps to reduce motion transfer.
Cotton and wool mattresses are packed tight and then tufted. Because of this these mattresses usually have good motion isolation. Usually no motion transfers to the other side of the mattress. If the mattress is made to be extra soft a little motion may transfer on a wool mattress.
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