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A Firm Double Mattress Balances Comfort and Support A firm double mattress balances comfort and support. It's ideal for back sleepers. Firmer mattresses can prevent the sagging that can cause back pain. They also help distribute weight evenly and reduce pressure on joints and muscles. A bed that is firm is usually recommended for stomach and back sleepers or those who have a larger body. It isn't ideal for those who sleep on their sides. Comfort The correct mattress can make the difference between a peaceful night and one that