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Is it time to get rid of that old, saggy bed and drastically improve your sleep quality with a new mattress? If so, the first thing you have to decide is which size you want. When buying a big ...

All products featured on Self are independently selected by Self editors. However, when you buy something through our retail links, Condé Nast may earn an affiliate commission. There’s a lot to think ...

The more we start to understand about our sleep, the more we realize how vital it is to our physical and mental health. In some cases, it can even prematurely age our brains and shorten our lives. But ...