The Best Inventions of 2021
November 10, 2021 6:13 AM EST

SPECIAL MENTION: Can you sleep better with a pillow that changes temperature? Moona thinks so. Its bedside system ($399) circulates water through a thin pad that slips inside your pillowcase, varying overnight from as low as 64 degrees to as warm as 95, based on your preferences and your sleep cycle, measured by an accelerometer. —Don Steinberg

Buy Now: Moona

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