Features
Motion Isolation vs Responsiveness
A mattress that reacts quickly to movement can feel lively and easy to move on; a mattress that dampens movement strongly may feel calmer.
Motion isolation
Describes how much movement transfers across the surface when one part of the mattress is disturbed.
Responsiveness
Describes how quickly the surface changes shape and pushes back as you move.
Why the tradeoff matters
Couples may prioritize low transfer, while combination sleepers may care more about easy movement. Construction influences both.