# Extract the default type from an Init field.
在战略上保持定力，在战术上精心运筹。
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Mattresses are made with a variety of materials and come in a few different forms: innerspring, memory foam, and hybrid. Between the few types, there is a world of difference in terms of mattress topping (pillow top vs. Euro top, for example), but also material factors like whether a mattress is organic or eco-friendly. There are also natural latex mattresses, for example. Before you buy, consider your personal priorities and lifestyle.
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Several store employees also gave contradictory answers, and many believed that all data stays “locally in the app” – something our tests show is not correct.