Plank Firm Luxe: Motion isolation test results

The lower the initial impact (IIA), the better the mattress is at dampening the original force (meaning there's less motion to transfer)

Plank Firm Luxe (Firm)
4.47
Plank Firm Luxe (Extra Firm)
3.8
Saatva Classic
7.863
Helix Midnight Luxe
7.45
DreamCloud Classic
7.965
Siena Signature
5.527
Bear Elite Hybrid
8.976
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m/s2
Initial impact Data
ProductValue
Plank Firm Luxe (Firm)4.47
Plank Firm Luxe (Extra Firm)3.8
Saatva Classic7.863
Helix Midnight Luxe7.45
DreamCloud Classic7.965
Siena Signature5.527
Bear Elite Hybrid8.976
The Plank Firm Luxe simply ate up the force of our 5kg slam ball. An average IIA of 4.47 m/s2 for the Firm side is lower than all our top rated mattresses... then the Extra Firm goes and beats it with an IIA of 3.8 m/s2. Even heavy movements (like your partner jumping into bed) will be quickly absorbed to reduce disruption.