Internal engineering test · Method: Construction note

Topper Migration Under Repeated Motion

Addressed by designCS-TST-005

Product revision: CS-MATTRESS-2026-08-A

Construction note — not a test result, and not an EN, ASTM, CPSC or medical certification.

What are we testing?

Could repeated adult movement move the topper enough to expose an underlying join or an open gap between mattresses?

Why this test matters

This is a critical question for pushed-together mattresses, where a shifted topper can expose an open gap between two separate mattresses.
In our system the answer sits in the construction itself, which is why we document it here rather than as a test.

Method basis

Answered at construction level rather than by a movement test. The load-based behaviour of the complete assembled system is covered by the Sleeping-Surface Gap Formation Test (CS-TST-006).

Why this cannot expose a gap here

Addressed by design

In our system the support mattresses are enclosed in one full-width cover that holds the modules firmly together. The surface beneath the topper is therefore itself continuous, with no open joins between loose mattresses. If the topper shifts, what lies beneath is that continuous covered surface — not a gap between separate mattresses. How the complete assembled system behaves under normal and adverse loads is documented separately in CS-TST-006.