Some people need a firmer mattress to support their body and reduce back pain, as a firm mattress won’t leave you sinking into it. Others just prefer the feel of a firmer mattress. You can expect mattress companies to clearly label their firm mattresses, though whether it has a medium-firm or firm-firm feel to you will depend on your body and sleeping position.
$179 $119 at Amazon (with ANC)
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至于更低端的型号，我反而不太推荐。购买时也不必过度纠结「是否原装未拆」。这类十多年前的设备，很多所谓的「全新库存」本质都是翻新壳，可以优先检查AMOLED 是否老化偏色、相机模组是否进灰、电池是否鼓包以及实体按键是否松动等等。
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