Sealy firm mattresses are manufactured by Sealy, the largest mattress manufacturer in the world. A Sealy Posturepedic firm mattress offers more compression resistance than other Sealy mattresses and belongs in the Sealy firm mattress category. Sealy Posturepedic firm also refers to the feel. Posturepedic firm mattresses feel less soft due to the increased resistance from the innersprings.
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