![]() Our Green Choice recommendations are designated with a green leaf icon in our comprehensive ratings and below. We also recently started examining a mattress’s impact on the environment and health-taking into account a range of factors, including materials and construction, durability, owner satisfaction, and shipping footprint. To learn more about how we test and rate mattresses, check out our mattress buying guide. The ratings for mattress comfort and owner satisfaction included in the Overall Score are based on data from survey results on almost 67,000 mattresses. We also test how well the mattress keeps its shape over time by operating a machine that moves a 300-plus-pound wood roller across the surface of each mattress 30,000 times. This tells us how easily sleepers should be able to shift their weight without disturbing a partner. To test stability, we drop a 38.5-pound weight onto the mattress and measure the vibrations at the point of impact and across the mattress. There are over 250 mattresses currently in our ratings-each with an Overall Score that is determined, in large part, by its performance on each test: sleeper support, firmness level, stabilization level, and durability. The highest-end mattresses typically offer more customization, more layers, and extra touches like tufting, pillow tops, and handles.
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