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The Serta 7-Inch Firm Hybrid is a low-profile king mattress that pairs a firm memory foam top with a coil base. Its thin build suits platform beds, bunk setups and sleepers who want a firm, supportive surface without a deep mattress. It is one of the most affordable ways into a hybrid, but it has less foam and fewer coils than Serta's thicker hybrids, so heavier sleepers and side sleepers may find it thin. Owners generally describe it as firm and easy to set up, while some find it too hard and report it sleeps warm.
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Lowest price we've seen: $437.89 on Nov 10 at Lowe's. Tracked across 1 store since Nov 10.
Owners mostly call it firm and supportive and like how easily it unrolls and sets up. Complaints center on it being too hard for side sleeping and on warmth for some sleepers.
