it's continuous rest throughout the night. >> many people wake up intermittently but string together all that little wake-ups and think that they were awake continuously because they've been thinking in between and we call that a sleep misperception. >> that way your doctor can work out whether you have insomnia or a different condition. here's the next step. abm's somnia heat mask. it cancels out noise and uses blue slight to ensure the user wakes up alert. the u.s. military helped fund it as it wanted to avoid the groggy effect of sleep meds an hem them take power naps. >> you need to be able to wake up and fight back immediately. you don't have the time to be groggy tore try to figure out what's going on. you have to get up, be ready to go and fight the threat out there.