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How to call soft and moderate? The simplest measurement method is: lie flat, hand to the neck, waist and hips to the thigh between the three obviously curved places to stretch inward to see if there is any gap; Roll over and use the same method to try to see if there is any gap between the concave part of the body curve and the mattress. If not, it proves that the mattress has a natural curve of neck, back, waist, hip and leg during sleep. In order to match, such a mattress can be said to be moderately soft and hard.
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