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Motion Separation

What is Motion Separation Index?

It is the measurement, of disturbance made by guest movement on a sleep surface.

A mattress with a higher Motion Separation Index allows a guest to sleep deeper longer.

The Simmons® Beautyrest® dramatically increases motion reduction. Guests "Sleep Better."

Simmons® Beautyrest® M.S.I. 137 Motion Separation Comparison

2.2x
Better Than

2.4x
Better Than

2.6x
Better Than

3.6x
Better Than

Company 1

Company 2 (Marshall Coil)

Company 3 (Marshall Coil)

Company 4

Company 5 One-Sided

Company 5



Simmons HealthSmart® Bed allows hotels to do something they've never been able to do before - clean the tops of their mattresses. Find out more.
In 1999, the Simmons Bedding Company introduced the Non-Flip mattress. Today there are over 14 million non-flip mattresses in use. The unique feature that distinguishes Beautyrest mattresses from the competition is our system of individually Pocketed Coil® springs. Read more about Simmons' history of innovation.
Watch the Beautyrest video

Beautyrest®: For decades it's been helping people sleep better together. Movement that happens on one side of the bed stays on one side of the bed. Watch the video to see why.