Yawnder Reviews · Original review material restored September 2026
Muse Mattress Review: Archived Original Cooling-Foam Testing Restored
Muse Sleep has been consolidated into Viscosoft, but the older Muse mattress review contained real thermal-camera, motion and construction testing.
Medium-firm dense foam
Yawnder reviewed the medium Muse. Its upper memory foam was relatively dense, producing strong pressure relief with slower recovery than more responsive foams.
Cold Wire cover
The standout feature was the phase-change-style cooling cover. In our infrared-camera test, surface heat dissipated quickly after contact.
Four-layer foam design
The reviewed model used gel-infused memory foam, additional memory foam and a high-density support core under the cooling cover.
Motion isolation
Dense foam absorbed movement extremely well, making the mattress quiet and stable for couples.
Limited sink
The medium version did not sink as deeply as many softer foam beds, which also reduced how much mattress material surrounded the body.
Current-shopping note
Muse Sleep is archived. This page preserves the mattress Yawnder actually tested and should not be read as current Viscosoft product guidance.
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Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 86 hold a complete standardized record and 41 a partial standardized record.