Put down that double espresso and read up: Experts say that a comfy mattress is key to having a great sleep. Thanks to these innovations, the future looks dozy.

WHAT’S NEW Helix Sleep makes customized mattresses based on your weight, fave sleep position and temperature preference. Your Build-a-Bear will be totes jealous (from $800, helixsleep.com).

WHAT’S NEXT Sensors in the mattress of Sleep Number’s “it bed” track your body’s sleep patterns and adjust to your routine. A linked app provides sleep-better suggestions. Maybe you have your deepest sleep when the thermostat is set to 20ºC, for ex­ample, or you like a firmer mattress after a workout. Available for purchase online this summer (around $1,400, itbed.sleepnumber.com/it).

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