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A Firm Double Mattress Balances Comfort and Support A double mattress that is firm balances comfort and support. It's great for back sleepers. Firmer mattresses can prevent the sagging that can cause back pain. They also help distribute weight evenly, reducing pressure to muscles and joints. A firm mattress is typically suggested for stomach and back sleepers as well as those with a larger build. It can be uncomfortable for those who sleep on their side. Comfort The right mattress can make all th