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The Plank is Brooklyn Bedding's two-sided innerspring mattress, and both sides are firm: one is extra firm, the other firm. At 11 inches thick, it is built for sleepers who want a flat, hard surface with little sink. It is one of the few two-sided mattresses from a direct-to-consumer brand, which sets it apart from most single-sided foam rivals.
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Lowest price we've seen: $561.75 on Nov 8 at Wayfair. Tracked across 7 stores since Nov 8.
Owners rate it 4.3 out of 5 across about 4,800 ratings. Most praise the firm support and the option to flip between two firmness levels. Complaints center on how hard it feels and on motion transfer.


