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Another gel memory foam layer follows that ... Back sleepers don't want to sink in as much as side sleepers, so a medium-firm mattress is better. When you're lying flat, it will keep your back ...
for memory- and latex-foam mattresses, higher scores indicate ease of changing sleep position. Indicates how firm a mattress is on our scale from 1 to 10, where 1 is very soft and 10 is very firm.