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A Firm Double Mattress Balances Comfort and Support A double mattress that is firm balances comfort and support. It's ideal for back sleepers. Firmer mattresses can help to prevent sagging, which could cause back pain. They also distribute the weight evenly, which reduces pressure on muscles and joints. A firm mattress is typically recommended for back and stomach sleepers as well as those with larger builds. It isn't ideal for those who sleep on their side. Comfort The right mattress can mean th