It was nighttime by that point, so decided to sleep on it and wait until morning to really try them on.

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Some patients with any abnormality "can't sleep at night until something's done about it, " he said.

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They can take it off when they take a shower but they wear it for the rest of the day until they go to sleep.

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At the end of the night, you tell it you're going to sleep by pressing and holding the lone button until the Up vibrates and the tiny moon-shaped light glows.

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