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Tom’s Guide
Tom’s Guide
Technology
Ruth Jones

Plank Firm vs Siena Mattress: which firm memory foam mattress should you buy?

Firm Siena Plank Firm the Plank Firm Plank Memory
The Plank Firm mattress on a bed frame in a bedroom (left) and the Siena Memory Foam Mattress on a bed frame in a bedroom (right).
Plank Firm Mattress

Type: Memory foam
Firmness option: Firm, Extra Firm
Height: 10"
Sizes: 14
Sleep trial: 120 nights
Warranty: 10 years
Price (on sale): from $561.75 at Plank Mattress

Siena Memory Foam Mattress

Type: Memory foam
Firmness option: Firm
Height: 10"
Sizes: 7
Sleep trial: 180 nights
Warranty: 10 years
Price (on sale): from $199 at Siena

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